Genesis 22:2-3

22:2 God said, “Take your son – your only son, whom you love, Isaac – and go to the land of Moriah! Offer him up there as a burnt offering on one of the mountains which I will indicate to you.”

22:3 Early in the morning Abraham got up and saddled his donkey. He took two of his young servants with him, along with his son Isaac. When he had cut the wood for the burnt offering, he started out for the place God had spoken to him about.