And all the men of his house, those born in the house and those bought with money from a foreigner, were circumcised with him.
We have here Abraham's obedience to the law of circumcision. He himself and all his family were circumcised, so receiving the token of the covenant and distinguishing themselves from other families, that had no part nor lot in the matter. 1. It was an implicit obedience: He did as God had said to him, and did not ask why or wherefore.
Commenting on Genesis 17:23-27
And all the men of his house,.... All the males, whether children or adult: born in the house, or bought with money of the stranger, were circumcised with him; by their will, and with their consent; not forced to it, as Aben Ezra rightly observes; and these being before trained up by him in religious exercises, were more easily prevailed upon by him to follow...
Gen 17:22-27 When God had finished His address and ascended again, Abraham immediately fulfilled the covenant duty enjoined upon him, by circumcision himself on that very day, along with all the male members of his house. Because Ishmael was 13 years old when he was circumcised, the Arabs even now defer circumcision to a much later period than the Jews, generally till between the ages...
Commenting on Genesis 17:22-27