Genesis 22:2-3

God said, “Take now your son, your only son [of promise], whom you love, Isaac, and go to the region of Moriah, and offer him there as a burnt offering on one of the mountains of which I shall tell you.” So Abraham got up early in the morning, saddled his donkey, and took two of his young men with him and his son Isaac; and he split the wood for the burnt offering, and then he got up and went to the place of which God had told him.