Genesis 22:15-18

Then the angel of the LORD called again to Abraham from heaven. “This is what the LORD says: Because you have obeyed me and have not withheld even your son, your only son, I swear by my own name that I will certainly bless you. I will multiply your descendants beyond number, like the stars in the sky and the sand on the seashore. Your descendants will conquer the cities of their enemies. And through your descendants all the nations of the earth will be blessed—all because you have obeyed me.”