This ruling is based on a Midrash that expresses the thought that on the departure of Yom Hakippurim a heavenly voice (Bat Kol) is heard declaiming the verse in Ecclesiastes.

to turn the Iliad

Here was the hidden gender curriculum in full flow - with very clear gendered values and expectations being imparted to the children who walked in: boys are loud and active and like 'sciencey' things such as building and constructing; girls, on the other hand, are quiet and passive, preferring to do 'caring' things and look pretty.

Never return evil for evil that's either real or imagined.