Reading Avraham's pilegesh relationship in light of shitas HaRambam of the Heter Pilegesh to a Melech.
Shuv raisi: See Maharam Shick OC 145 and Meshech Chochmah Bereishis 16:3 who suggest along the lines of my pshat for Rashi. See also Sheilas Yaavetz v2 15 who says my pshat in the Gemara Yoma.