20:2כ׳:ב׳
1 א

ויאמר אברהם. כָּאן לֹא נָטַל רְשׁוּת אֶלָּא עַל כָּרְחָהּ שֶׁלֹּא בְטוֹבָתָהּ, לְפִי שֶׁכְּבָר לֻקְּחָה לְבֵית פַּרְעֹה עַל יְדֵי כֵן:

ויאמר אברהם AND ABRAHAM SAID — This time he did not ask her consent but forcibly and against her inclination he stated that she was his sister, because she had already been taken once to Pharaoh’s house on account of this (Genesis Rabbah 52:4).

2 ב

אל שרה אשתו. עַל שָׂרָה אִשְׁתּוֹ, כַּיוֹצֵא בוֹ אֶל הִלָּקַח אֲרוֹן וְגוֹ' וְאֶל מוֹת חָמִיהָ (שמואל א ד'), שְׁנֵיהֶם בִּלְשׁוֹן עַל:

אל שרה אשתו OF SARAH HIS WIFE — means in reference to (אֶל in sense of עַל) just as (1 Samuel 4:21) “in reference to (אל) the ark of God being taken, and in reference to (אל) her father-in-law”, where the word אל, in both cases, has the same meaning as על.