When his son Isaac was eight days old, Abraham circumcised him, as God had commanded him.
4. And Abraham circumcised his son . Abraham pursued his uniform tenor of obedience, in not sparing his own son. For, although it would be painful for him to wound the tender body of the infant; yet, setting aside all human affection, he obeys the word of God.
Long-looked-for comes at last. The vision concerning the promised seed is for an appointed time, and now, at the end, it speaks, and does not lie; few under the Old Testament were brought into the world with such expectation as Isaac was, not for the sake of any great person eminence at which he was to arrive, but because he was to be, in this...
Commenting on Genesis 21:1-8
And Abraham was an hundred years old when son Isaac was born unto him. So that this was years after his departure from Haran, and coming into the land of Canaan, for then he was seventy five years of age, Gen 12:4; and this exactly agrees with the account of Demetrius, as related by Polyhistor, an Heathen writer (o), who makes Isaac to be born...