The Fall of the Despot in Damascus

And this is the sign: when you see the Eastern despot that is in Damascus has fallen the kingship of the Easterners has fallen and then will sprout the salvation of Israel, and Moshiach ben David comes and will ascend to Yerushalayim and will take delight upon her, as is said "the humble ones will inherit the land and will delight on the abundance of peace". G-d in His mercy should send us the redeemer speedily in our days amen.

From the Midrash of Rabbi Shimon Bar Yochai (Otzar Midrashim)