Genesis 22:2, 7-8, 13

And he said, Take now thy son, thine only son, whom thou lovest, even Isaac, and get thee into the land of Moriah; and offer him there for a burnt-offering upon one of the mountains which I will tell thee of.

And Isaac spake unto Abraham his father, and said, My father: and he said, Here am I, my son. And he said, Behold, the fire and the wood: but where is the lamb for a burnt-offering? And Abraham said, God will provide himself the lamb for a burnt-offering, my son: so they went both of them together.

And Abraham lifted up his eyes, and looked, and, behold, behind him a ram caught in the thicket by his horns: and Abraham went and took the ram, and offered him up for a burnt-offering in the stead of his son.