OLD TESTAMENT REFERENCES TO TONGUES
Christians tend to think of tongues as a New Testament phenomenon. This is wrong thinking. There is nothing in the New Testament that does not also exist in the Old Testament. Consider these examples:

Genesis 11:2-9  As men moved eastward, they found a plain in Shinar and settled there. 3 They said to each other, “Come, let’s make bricks and bake them thoroughly.” They used brick instead of stone, and tar for mortar. 4 Then they said, “Come, let us build ourselves a city, with a tower that reaches to the heavens, so that we may make a name for ourselves and not be scattered over the face of the whole earth.”5 But the LORD came down to see the city and the tower that the men were building. 6 The LORD said, “If as one people speaking the same language they have begun to do this, then nothing they plan to do will be impossible for them. 7 Come, let us go down and confuse their language so they will not understand each other.”8 So the LORD scattered them from there over all the earth, and they stopped building the city. 9 That is why it was called Babel–because there the LORD confused the language of the whole world. From there the LORD scattered them over the face of the whole earth.

Psalm 114:1-6  When Israel went forth from Egypt, the house of Jacob from a people of strange language, 2 Judah became his sanctuary, Israel his dominion. 3 The sea looked and fled, Jordan turned back. 4 The mountains skipped like rams, the hills like lambs. 5 What ails you, O sea, that you flee? O Jordan, that you turn back? 6 O mountains, that you skip like rams? O hills, like lambs?

Isaiah 28:1-16  Woe to the proud crown of the drunkards of E’phraim, and to the fading flower of its glorious beauty, which is on the head of the rich valley of those overcome with wine! 2 Behold, the Lord has one who is mighty and strong; like a storm of hail, a destroying tempest, like a storm of mighty, overflowing waters, he will cast down to the earth with violence. 3 The proud crown of the drunkards of E’phraim will be trodden under foot; 4 and the fading flower of its glorious beauty, which is on the head of the rich valley, will be like a first-ripe fig before the summer: when a man sees it, he eats it up as soon as it is in his hand. 5 In that day the LORD of hosts will be a crown of glory, and a diadem of beauty, to the remnant of his people; 6 and a spirit of justice to him who sits in judgment, and strength to those who turn back the battle at the gate. 7 These also reel with wine and stagger with strong drink; the priest and the prophet reel with strong drink, they are confused with wine, they stagger with strong drink; they err in vision, they stumble in giving judgment. 8 For all tables are full of vomit, no place is without filthiness. 9 “Whom will he teach knowledge, and to whom will he explain the message? Those who are weaned from the milk, those taken from the breast? 10 For it is precept upon precept, precept upon precept, line upon line, line upon line, here a little, there a little.” 11 Nay, but by men of strange lips and with an alien tongue the LORD will speak to this people, 12 to whom he has said, “This is rest; give rest to the weary; and this is repose”; yet they would not hear. 13 Therefore the word of the LORD will be to them precept upon precept, precept upon precept, line upon line, line upon line, here a little, there a little; that they may go, and fall backward, and be broken, and snared, and taken. 14 Therefore hear the word of the LORD, you scoffers, who rule this people in Jerusalem! 15 Because you have said, “We have made a covenant with death, and with Sheol we have an agreement; when the overwhelming scourge passes through it will not come to us; for we have made lies our refuge, and in falsehood we have taken shelter”; 16 therefore thus says the Lord GOD, “Behold, I am laying in Zion for a foundation a stone, a tested stone, a precious cornerstone, of a sure foundation: ‘He who believes will not be in haste.’

Isaiah 33:14-19  The sinners in Zion are afraid; trembling has seized the godless: “Who among us can dwell with the devouring fire? Who among us can dwell with everlasting burnings?” 15 He who walks righteously and speaks uprightly, who despises the gain of oppressions, who shakes his hands, lest they hold a bribe, who stops his ears from hearing of bloodshed and shuts his eyes from looking upon evil, 16 he will dwell on the heights; his place of defense will be the fortresses of rocks; his bread will be given him, his water will be sure. 17 Your eyes will see the king in his beauty; they will behold a land that stretches afar. 18 Your mind will muse on the terror: “Where is he who counted, where is he who weighed the tribute? Where is he who counted the towers?” 19 You will see no more the insolent people, the people of an obscure speech which you cannot comprehend, stammering in a tongue which you cannot understand.

Ezekiel 3:1-10  And he said to me, “Son of man, eat what is offered to you; eat this scroll, and go, speak to the house of Israel.” 2 So I opened my mouth, and he gave me the scroll to eat. 3 And he said to me, “Son of man, eat this scroll that I give you and fill your stomach with it.” Then I ate it; and it was in my mouth as sweet as honey. 4 And he said to me, “Son of man, go, get you to the house of Israel, and speak with my words to them. 5 For you are not sent to a people of foreign speech and a hard language, but to the house of Israel– 6 not to many peoples of foreign speech and a hard language, whose words you cannot understand. Surely, if I sent you to such, they would listen to you. 7 But the house of Israel will not listen to you; for they are not willing to listen to me; because all the house of Israel are of a hard forehead and of a stubborn heart. 8 Behold, I have made your face hard against their faces, and your forehead hard against their foreheads. 9 Like adamant harder than flint have I made your forehead; fear them not, nor be dismayed at their looks, for they are a rebellious house.” 10 Moreover he said to me, “Son of man, all my words that I shall speak to you receive in your heart, and hear with your ears

Nehemiah 13:19-27  When it began to be dark at the gates of Jerusalem before the sabbath, I commanded that the doors should be shut and gave orders that they should not be opened until after the sabbath. And I set some of my servants over the gates, that no burden might be brought in on the sabbath day. 20 Then the merchants and sellers of all kinds of wares lodged outside Jerusalem once or twice. 21 But I warned them and said to them, “Why do you lodge before the wall? If you do so again I will lay hands on you.” From that time on they did not come on the sabbath. 22 And I commanded the Levites that they should purify themselves and come and guard the gates, to keep the sabbath day holy. Remember this also in my favor, O my God, and spare me according to the greatness of thy steadfast love. 23 In those days also I saw the Jews who had married women of Ashdod, Ammon, and Moab; 24 and half of their children spoke the language of Ashdod, and they could not speak the language of Judah, but the language of each people. 25 And I contended with them and cursed them and beat some of them and pulled out their hair; and I made them take oath in the name of God, saying, “You shall not give your daughters to their sons, or take their daughters for your sons or for yourselves. 26 Did not Solomon king of Israel sin on account of such women? Among the many nations there was no king like him, and he was beloved by his God, and God made him king over all Israel; nevertheless foreign women made even him to sin. 27 Shall we then listen to you and do all this great evil and act treacherously against our God by marrying foreign women?”

Esther 1   In the days of Ahasu-e’rus, the Ahasu-e’rus who reigned from India to Ethiopia over one hundred and twenty-seven provinces, 2 in those days when King Ahasu-e’rus sat on his royal throne in Susa the capital, 3 in the third year of his reign he gave a banquet for all his princes and servants, the army chiefs of Persia and Media and the nobles and governors of the provinces being before him, 4 while he showed the riches of his royal glory and the splendor and pomp of his majesty for many days, a hundred and eighty days. 5 And when these days were completed, the king gave for all the people present in Susa the capital, both great and small, a banquet lasting for seven days, in the court of the garden of the king’s palace. 6 There were white cotton curtains and blue hangings caught up with cords of fine linen and purple to silver rings and marble pillars, and also couches of gold and silver on a mosaic pavement of porphyry, marble, mother-of-pearl and precious stones. 7 Drinks were served in golden goblets, goblets of different kinds, and the royal wine was lavished according to the bounty of the king. 8 And drinking was according to the law, no one was compelled; for the king had given orders to all the officials of his palace to do as every man desired. 9 Queen Vashti also gave a banquet for the women in the palace which belonged to King Ahasu-e’rus. 10 On the seventh day, when the heart of the king was merry with wine, he commanded Mehu’man, Biztha, Harbo’na, Bigtha and Abag’tha, Zethar and Carkas, the seven eunuchs who served King Ahasu-e’rus as chamberlains, 11 to bring Queen Vashti before the king with her royal crown, in order to show the peoples and the princes her beauty; for she was fair to behold. 12 But Queen Vashti refused to come at the king’s command conveyed by the eunuchs. At this the king was enraged, and his anger burned within him. 13 Then the king said to the wise men who knew the times–for this was the king’s procedure toward all who were versed in law and judgment, 14 the men next to him being Carshe’na, Shethar, Adma’tha, Tarshish, Meres, Marse’na, and Memu’can, the seven princes of Persia and Media, who saw the king’s face, and sat first in the kingdom–: 15 “According to the law, what is to be done to Queen Vashti, because she has not performed the command of King Ahasu-e’rus conveyed by the eunuchs?” 16 Then Memu’can said in presence of the king and the princes, “Not only to the king has Queen Vashti done wrong, but also to all the princes and all the peoples who are in all the provinces of King Ahasu-e’rus. 17 For this deed of the queen will be made known to all women, causing them to look with contempt upon their husbands, since they will say, ‘King Ahasu-e’rus commanded Queen Vashti to be brought before him, and she did not come.’ 18 This very day the ladies of Persia and Media who have heard of the queen’s behavior will be telling it to all the king’s princes, and there will be contempt and wrath in plenty. 19 If it please the king, let a royal order go forth from him, and let it be written among the laws of the Persians and the Medes so that it may not be altered, that Vashti is to come no more before King Ahasu-e’rus; and let the king give her royal position to another who is better than she. 20 So when the decree made by the king is proclaimed throughout all his kingdom, vast as it is, all women will give honor to their husbands, high and low.” 21 This advice pleased the king and the princes, and the king did as Memu’can proposed; 22 he sent letters to all the royal provinces, to every province in its own script and to every people in its own language, that every man be lord in his own house and speak according to the language of his people.