Genesis 22:10-13

Then Abraham took the knife in his hand to plunge it into his son, but the angel of YAHWEH called to him from heaven, saying, “Abraham! Abraham!” “Yes, I’m here,” he answered. “Do not lay a hand on the boy or harm him,” he said, “for now, I know you are fully dedicated to me, since you did not withhold your son, your beloved son, from me.” As Abraham looked up, his eyes fell upon a ram caught by its horns in a nearby thicket. Abraham took the ram and sacrificed it on the altar as a burnt offering in Isaac’s place.