Midrash su Salmi 90:15

All of the commandment that I command you today (Deuteronomy 8:1): Any commandment that you do, say [that] it is as if you heard it today at Sinai from Moshe; as so is it written, "that I command you today guard to observe in order that you shall live." You and your children, in order that you shall live to others, in order that you shall live in the world to come. (Deuteronomy 8:1) "And increase," with children; "and increase," with livestock; "and increase," with silver and gold. Another interpretation: "And increase," (which can be read as grow tall) is speaking about the messiah who will come in a chariot. "And increase (or grow)," in height. Rabbi Yehudah says, "In the future, each and every one in Israel will be a hundred cubits tall, as it is stated (Psalms 144:12), 'our daughters are like cornerstones trimmed to give shape to a chamber'; and it is stated (Ezekiel 42:8), 'the chamber a hundred cubits.'" Rabbi Shimon ben Yochai says, "Two hundred cubits, as it is stated (Leviticus 26:13), 'and walked with you upright (komemiyut, which sounds like the plural of height).' And in the future, each and every one of Israel will be seen by the nations when he leaves the city." Rabbi Chiya bar Yaakov said, "There are places [in which] they call pat liftoota, pisata, as it is stated (Psalms 72:16), "Let abundant (pisat) grain be in the land, etc." Rabbi Chaninah bar Pappa and Rabbi Shmuel bar Maniya [differed about the matter]. One said, "Turnips (lefet) was not bread." And the other said, "It was not bread, but rather it will make bread in the future; as it is stated (Psalms 72:16), "Let abundant (pisat) grain be in the land, etc." When? In the time of the messiah. And how many are the days of the messiah? Rabbi Akiva says, "Forty years, in the same way that Israel was in the wilderness forty years. And He drags them and pulls them out to the wilderness and feeds them saltwort and broom, as it is stated (Job 30:4), 'They pluck saltwort and wormwood; the roots of broom are their bread.'" Rabbi Eliezer says, "One hundred years." Rabbi Berachaya says in the name of Rabbi Dosa, "Six hundred years." Rabbi says, "Four hundred years, as stated (Micah 7:15), 'As in the days when you left from the land of Egypt I will show him wondrous deeds.' Just like [the sojourn in] Egypt was four hundred years, so [too] will the days of the messiah be four hundred years." Rabbi Eliezer [beRebbi Yose the Galilean] says a thousand years, as it is stated ([Psalms 90:15], 'Give us joy for as long as You have afflicted us.') [(Psalms 90:4), 'For in Your sight a thousand years are like yesterday that has passed.']" Rabbi Abahu says, "Seven thousand years, as it is stated (Isaiah 62:5), 'As a youth espouses a maiden, your sons shall espouse you' - just as the days of rejoicing (for a marriage) are seven, so will the days of the messiah be seven thousand years." Our rabbis said, "Two thousand years, as it is stated ([Isaiah 63:4], 'For I had planned a day of vengeance, and My year of redemption arrived.') [(Psalms 90:15)], 'Give us joy for as long as (literally, like the days) You have afflicted us.']" And after the days of the messiah is the world to come. And [then] the Holy One, blessed be He, appears in His glory and shows His forearm, as it is stated (Isaiah 52:10), "The Lord will bare His holy arm in the sight of all the nations, and the very ends of earth shall see the victory of our God." At that time, Israel sees the Holy One, blessed be He, in His glory, as it is stated (Isaiah 52:8), "for every eye shall behold when the Lord returns to Zion, etc."

We are taught in another Baraitha that R. Eliezer says: "The Messianic period will be forty years," as it is written here (Deut. 8, 3) And he afflicted thee, and suffered thee to hunger, and it is written there (Ps. 90, 15) Cause us to rejoice as many days as those wherein Thou hast afflicted us." [Just as their journey in the desert was forty years, so long will be the days of the Messiah.] R. Dosa, however, says: "Four hundred years, as it is said Cause us to rejoice as many days as thou hast afflicted us, and it is also written (Gen. 15, 13) And they will afflict them four hundred years." Rabbi said: "Three hundred and sixty-five years, according to the days of the Solar year, as it is said (Isa. 63, 4) For the days of vengeance was in my heart, and the year of My redeemer was come." What does the day of vengeance is in My heart mean? R. Jochanan said: "I revealed it to My heart, but not to any other member of My body." And R. Simon b. Lakish said: "I revealed it to My heart, but not to the ministering angels." Abimi b. Obahu taught: "Seven thousand years will be the Messianic period for Israel, as it is said (Ib. 62, 5) And as a bridegroom is glad over the bride, so will thy God be glad over thee." R. Juda said in the name of Samuel: "The Messianic period will be as long as it is from the day of creation till now," as it is said (Deut. 11, 21) As the days of heaven over the earth." R. Nachman b. Isaac said: "As from the day of Noah till now," as it is said (Is. 54, 9) For as the waters of Noah is this unto Him! as I have sworn, etc."