Commentary for Ezekiel 38:17

Are you he In those days, the Holy One, blessed be He, will say, “Are you the one about whom I spoke in ancient days through My servants, the prophets of Israel, e.g. Ezekiel and Zechariah?” For he [Zechariah] too prophesied about the wars of Gog and Magog (Zech. 14:2): “And I will gather all the nations, etc.” Our Sages said (Sanh. 17a): Eldad and Medad they [also] prophesied about it. That is the שָּׁנִים stated here. Do not read שָּׁנִים, years, but שְּׁנַיִם, two. Two prophets prophesied one prophecy at one time (though not in the same style of expression).