Genesis 21:4

4 and Abraham circumciseth Isaac his son, [being] a son of eight days, as God hath commanded him.

Genesis 21:4 Meaning and Commentary

Genesis 21:4

And Abraham circumcised his son Isaac, being eight days old as,
God had commanded him.
] ( Genesis 17:12 ) , and was the first that we read of that was circumcised on that day, according to the divine precept, which Abraham strictly observed; for though this was the son of the promise, and of his old age, for whom he had the most affectionate regard, yet he administered this bloody ordinance on him; nor did he defer it beyond the time, and was himself the operator, as it seems; all which shows his strict regard, and ready and cheerful obedience to the command of God.

Genesis 21:4 In-Context

2 and Sarah conceiveth, and beareth a son to Abraham, to his old age, at the appointed time that God hath spoken of with him;
3 and Abraham calleth the name of his son who is born to him, whom Sarah hath born to him -- Isaac;
4 and Abraham circumciseth Isaac his son, [being] a son of eight days, as God hath commanded him.
5 And Abraham [is] a son of a hundred years in Isaac his son being born to him,
6 and Sarah saith, `God hath made laughter for me; every one who is hearing laugheth for me.'
Young's Literal Translation is in the public domain.