11:2י״א:ב׳
1 א

בנסעם מקדם. שֶׁהָיוּ יוֹשְׁבִים שָׁם, כְּדִכְתִיב לְמַעְלָה וַיְהִי מוֹשָׁבָם וְגו' הַר הַקֶּדֶם וְנָסְעוּ מִשָּׁם לָתוּר לָהֶם מָקוֹם לְהַחֲזִיק אֶת כֻּלָּם וְלֹא מָצְאוּ אֶלָּא שִׁנְעָר:

בנסעם מקדם AS THEY JOURNEYED FROM THE EAST where they were then dwelling, as it is written above, (Genesis 20:30) “And their dwelling place was … the mountain of the East”. From there they journeyed to search out for themselves a place that would accommodate them all, but they found none except Shinar (Genesis Rabbah 38:7).