In the selfsame day was Abraham circumcised, and Ishmael his son. This is repeated, that it might be taken notice of that both were circumcised according to the command of God, and on the very day in which it was given. Jarchi observes, it was in the day, and not in the night; which shows, says he, he was not afraid of the Heathen, and of mockers; and that his enemies, and the men of that generation, might not say, if we had seen him, we would not have suffered him to be circumcised, and keep the commandment of God: and some of the Jewish writers (e) fable, that he was circumcised on the day afterwards appointed by Moses for the day of atonement, and that in the place where he was circumcised the altar was built; but all this is without any foundation. This affair was transacted, according to Bishop Usher (f), A. M. 2107, and before Christ 1897.

(e) Pirke Eliezer, ut supra. (c. 29.) (f) Annales Ver. Test. p. 8.

In the selfsame day was Abraham circumcised, and Ishmael his son.

17:23-27 Abraham 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. It was an implicit obedience; he did as God said unto him, and did not ask why or wherefore. He did it because God bade him. It was a speedy obedience; in the self-same day. Sincere obedience makes no delay. Not only the doctrines of revelation, but the seals of God's covenant, remind us that we are guilty, polluted sinners. They show us our need of the blood of atonement; they point to the promised Saviour, and teach us to exercise faith in him. They show us that without regeneration, and sanctification by his Spirit, and the mortification of our corrupt and carnal inclinations, we cannot be in covenant with God. But let us remember that the true circumcision is that of the heart, by the Spirit, Ro 2:28,29. Both under the old and new dispensation, many have had the outward profession, and the outward seal, who were never sealed by the Holy Spirit of promise.