Genesis 22:9-12

22:9 When they came to the place God had told him about, Abraham built the altar there and arranged the wood on it. Next he tied up his son Isaac and placed him on the altar on top of the wood. 22:10 Then Abraham reached out his hand, took the knife, and prepared to slaughter his son. 22:11 But the Lord’s angel called to him from heaven, “Abraham! Abraham!” “Here I am!” he answered. 22:12 “Do not harm the boy!” the angel said. “Do not do anything to him, for now I know that you fear God because you did not withhold your son, your only son, from me.”

Genesis 22:16-18

22:16 and said, “‘I solemnly swear by my own name,’ decrees the Lord, ‘that because you have done this and have not withheld your son, your only son, 22:17 I will indeed bless you, and I will greatly multiply your descendants so that they will be as countless as the stars in the sky or the grains of sand on the seashore. Your descendants will take possession of the strongholds of their enemies. 22:18 Because you have obeyed me, all the nations of the earth will pronounce blessings on one another using the name of your descendants.’”