“On the eighth day, the flesh of his foreskin shall be circumcised” (Leviticus 12:3) Another matter, “when a woman conceives” – that is what is written: “Distribute a portion to seven, and to eight as well” (Ecclesiastes 11:2). “Distribute a portion to seven,” these are the seven days of menstruation. “And to eight as well,” these are the eight days of circumcision. The Holy One blessed be He said: ‘If you observed the days of menstruation, I will grant you a son and you will circumcise him at eight days.’ That is, “on the eight day the flesh of his foreskin shall be circumcised.”