Genesis 21:4
A plain-spoken deep dive on this verse. Read the chapter →
When his son Isaac was eight days old, Abraham circumcised him, as God had commanded him.
Commentaries
Excerpts gathered from published commentaries to ground the reading.
Birth of Isaac. - Jehovah did for Sarah what God had promised in Gen 17:6 (cf. Gen 18:14): she conceived, and at the time appointed bore a son to Abraham, when he was 100 years old. Abraham gave it the name of Jizchak (or Isaac), and circumcised it on the eighth day. The name for the promised son had been selected by God, in connection with Abraham's laughing (Gen 17:17 and Gen 17:19), to indicate the nature of his birth and existence. For as his laughing sprang from the contrast between the idea and the reality; so through a miracle of grace the birth of Isaac gave effect to this contrast between the promise of God and the pledge of its fulfilment on the one hand, and the incapacity of Abraham for begetting children, and of Sarah for bearing them, on the other; and through this name, Isaac was designated as the fruit of omnipotent grace working against and above the forces of nature. Sarah also, who had previously laughed with unbelief at the divine promise (Gen 18:12), found a reason in the now accomplished birth of the promised son for laughing with joyous amazement; so that she exclaimed, with evident allusion to his name, "A laughing hath God prepared for me; every one who hears it will laugh to me" (i.e., will rejoice with me, in amazement at the blessing of God which has come upon me even in my old age), and gave a fitting expression to the joy of her heart, in this inspired tristich (Gen 21:7): "Who would have said unto Abraham: Sarah is giving suck; for I have born a son to his old age." מלּל is the poetic word for דּבּר, and מי before the perfect has the sense of - whoever has said, which we should express as a subjunctive; cf. Kg2 20:9; Psa 11:3, etc.
Open source ↗In this chapter we have, I. Isaac, the child of promise born into Abraham's family (Gen 21:1-8). II. Ishmael, the son of the bondwoman, cast out of it (Gen 21:9-21). III. Abraham's league with his neighbour Abimelech (Gen 21:22-32). IV. His devotion to his God (Gen 21:33).
Open source ↗Original language
The Hebrew and Greek words behind this passage, with Strong's numbers — from openscriptures (CC BY-SA).
Cross-references
Other passages the community most often connects to this one. Tap to read.
Then God gave Abraham the covenant of circumcision, and Abraham became the father of Isaac and circumcised him on the eighth day. And Isaac became the father of Jacob, and Jacob of the twelve patriarchs.
If a foreigner resides with you and wants to celebrate the LORD’s Passover, all the males in the household must be circumcised; then he may come near to celebrate it, and he shall be like a native of the land. But no uncircumcised man may eat of it.
See that you do everything I command you; do not add to it or subtract from it.
On the eighth day, when they came to circumcise the child, they were going to name him after his father Zechariah.
When the eight days until His circumcision had passed, He was named Jesus, the name the angel had given Him before He had been conceived.
And on the eighth day the flesh of the boy’s foreskin is to be circumcised.
Both of them were righteous in the sight of God, walking blamelessly in all the commandments and decrees of the Lord.