Midrash su Ezechiele 38:17

(Fol. 17) Our Rabbis were taught (Ib. 11, 26) And there remained two men in the camp. According to some, it means that their names remained in the urn. For, at the time the Holy One, praised be He! said to Moses: Gather unto Me seventy men of the elders of Israel, Moses said [to himself]: "How shall I do it? Shall I appoint six of each tribe? Then there will be two more. Shall I take five of each? Then there will be ten less. Shall I appoint from two tribes." So he chose six from each, and each? Then I will bring jealousy among the tribes." So he chose six from each, and brought seventy-two ballots. On seventy he wrote Zaken (elder), and two he left blank. After he had mixed them all up and put all of them into the urn, he said to them: "Go, each, and take your ballot." To the one who drew the ballot on which "Elder" was written he said: "You are already sanctified by Heaven." But to those who drew the blanks he said: "Since Heaven did not select you, I cannot alter it." Similar was the following case (Ib. 3, 47) Thou shalt take five shekels a piece for the poll. Moses said to himself: "How shall I do it? If I should say to one, 'Give the shekels,' he may answer, 'The Levite has already redeemed me.'" Therefore he brought twenty-two thousand ballots and on each he wrote: "Levi;" and on two hundred and seventy-three he wrote "five shekels," mixed them, put them in the urn, and said to the people: "Draw your ballot." To the one who drew on which "Levi" was written, he said: "The Levite has redeemed you." And he who drew five shekels was told to pay the amount and go." R. Simon, however, said [Eldad and Medad] remained in the camp; for when the Holy One, praised be He! said to Moses: Gather unto Me seventy men of the Elders of Israel, they said: "We are not worthy of such a high appointment." And the Holy One, praised be He! said: "Because ye were modest, I will increase your grace." And what grace was increased to them? All the seventy had prophesied once, and ceased; but these two did not cease to prophesy. And what was their prophecy? They said: "Moses shall die, and Joshua shall bring Israel to his land." Aba Chanin, however, said in the name of R. Elazar: "They prophesied about the quail, saying, 'Come up, quail. Come up, quail." And R. Nachman said: "They prophesied about Gog and Magog, as it is said (Ezek. 38, 17) Then hath said the Lord Eternal: Art thou (not) he of whom I have spoken in ancient days through means of My servants, the prophets of Israel, who prophesied in those days (Shanim) years, that I would bring thee against them?" Do not read Shanim (years) but Shnayim (two). And who were the two who had prophesied at one period, with one and the same prophecy? Eldad and Medad.