Vayeira וירא 2023 a G-dly Covenant

There is a difference between a covenant made between two people and one made with G-d. One made between humans is limited and has the ability to change, however, a convenant with G-d, Who is unlimited, remains forever. That is why Hashem commanded of Avrohom to have a Bris Milah for himself and his children, so that they could be entered in a covenant that would last forever. Additionally, that’s why a child receives his bris at only 8 days old - when there is no human involvement but a covenant only from G-d.
לקו״ש כה