Then Avraham took his son Yishmael, and all those born in his house… and he circumcised the flesh of their foreskins on that very day…
Rashi on Genesis 17:23 — Rashi cites Bereshit Rabbah 47:9 for Avraham’s performing the circumcision in daylight on the very day he was commanded.
English: “On that very day” — on the very day when he was commanded; by day and not by night. He was afraid neither of the nations nor of the scoffers, so that his enemies and the people of his generation would not say: If we had seen him, we would not have allowed him to circumcise and fulfill the commandment of the Omnipresent.
Supplementary classical material not listed by Torah Temimah under this exact passuk.