Psalm 105:10

Verse 10. And confirmed the same unto Jacob for a law. Jacob in his wondrous dream (Ge 28:10-15) received a pledge that the Lord's mode of procedure with him would be in accordance with covenant relations: for said Jehovah, "I will not leave thee till I have done that which I have spoken to thee of." Thus, if we may so speak with all reverence, the covenant became a law unto the Lord himself by which he bound himself to act. O matchless condescension, that the most free and sovereign Lord should put himself under covenant bonds to Iris chosen, and make a law for himself, though he is above all law.

And to Israel for an everlasting covenant. When he changed Jacob's name he did not change his covenant, but it is written, "he blessed him there" ( Genesis 32:29 ), and it was with the old blessing, according to the unchangeable word of abiding grace.