12:14י״ב:י״ד
1 א

ויהי כבוא אברם מצרימה. הָיָה לוֹ לוֹמַר כְּבוֹאָם מִצְרַיְמָה? אֶלָּא לִמֵּד שֶׁהִטְמִין אוֹתָהּ בְּתֵבָה, וְעַל יְדֵי שֶׁתָּבְעוּ אֶת הַמֶּכֶס פָּתְחוּ וְרָאוּ אוֹתָהּ:

ויהי כבא אברם מצרימה AND IT CAME TO PASS WHEN ABRAM WAS COME INTO EGYPT —It should have said, “when they were come into Egypt”; but the use of the singular teaches us that he hid her in a chest, and when they demanded the custom dues they opened it and discovered her (Genesis Rabbah 40:5).