Genesis 32:12

And thou saidst, I will surely do thee good,.... All kind of good, most certainly and constantly; so Jacob rightly interpreted the promise, "I will be with thee", Genesis 31:3; for the promise of God's presence includes and secures all needful good to his people; and from this general promise Jacob draws an argument for a special and particular good, the preservation of him and his family, he was now pleading for; and the rather he might hope to succeed, since the following promise was also made him:

and make thy seed as the sand of the sea, which cannot be numbered for multitude; which could not be fulfilled, if he and his family were cut off at once, as he feared; but God is faithful who has promised.