By myself have I sworn - So we find that the person who was called the angel of the Lord is here called Jehovah; See note on Genesis 22:2. An oath or an appeal to God is, among men, an end to strife; as God could swear by no greater, he sware by himself: being willing more abundantly, says the apostle, to show unto the heirs of promise the immutability of his counsel, he confirmed it by an oath, that two immutable things, (his Promise and his Oath), in which it was impossible for God to lie, we might have a strong consolation, who have fled for refuge to lay hold on the hope set before us. See Hebrews 6:13-18.

And said, by myself have I sworn, saith the Lord,.... Which Aben Ezra observes is a great oath, and abides for ever; for because he could swear by no greater, he swore by himself, his own nature, perfections, and life, Hebrews 6:13; hence it appears, that the Angel that called to Abraham was a divine Person, the true Jehovah:

for because thou hast done this thing, and hast not withheld thy son,

thine only son; that is, from the Lord, as in Genesis 22:12; and is here repeated as being a most marvellous thing, a wonderful instance of faith in God, and fear of him, and of love and obedience to him; for, with respect to the will of Abraham, and as far as he was suffered to go, it was as much done as it was possible for him to do, and was looked upon as if actually done: yet this is not observed as meritorious of what follows; the promise of which had been made before, but is now repeated to show what notice God took of, and how well pleased he was with what had been done; and therefore renews the promise, which of his own grace and good will he had made, for the strengthening of Abraham's faith, and to encourage others to obey the Lord in whatsoever he commands them.

And said, By {h} myself have I sworn, saith the LORD, for because thou hast done this thing, and hast not withheld thy son, thine only son:

(h) Signifying, that there is none greater then he.

22:16 Because thou hast done this thing, and hast not with - held thy son, thine only son - He lays a mighty emphasis upon that, and Ge 22:18, praises it as an act of obedience, in it thou hast obeyed my voice. By myself have I sworn - For he could swear by no greater.

22:15-19 There are high declarations of God's favour to Abraham in this confirmation of the covenant with him, exceeding any he had yet been blessed with. Those that are willing to part with any thing for God, shall have it made up to them with unspeakable advantage. The promise, ver. 18, doubtless points at the Messiah, and the grace of the gospel. Hereby we know the loving-kindness of God our Saviour towards sinful man, in that he hath not withheld his Son, his only Son, from us. Hereby we perceive the love of Christ, in that he gave himself a sacrifice for our sins. Yet he lives, and calls to sinners to come to him, and partake of his blood-bought salvation. He calls to his redeemed people to rejoice in him, and to glorify him. What then shall we render for all his benefits? Let his love constrain us to live not to ourselves, but to Him who died for us, and rose again. Admiring and adoring His grace, let us devote our all to his service, who laid down his life for our salvation. Whatever is dearest to us upon earth is our Isaac. And the only way for us to find comfort in an earthly thing, is to give it by faith into the hands of God. Yet remember that Abraham was not justified by his readiness to obey, but by the infinitely more noble obedience of Jesus Christ; his faith receiving this, relying on this, rejoicing in this, disposed and made him able for such wonderful self-denial and duty.