Genesis 22:4

2 And he said, Take now your son, your only Isaac, whom you lovest, and get you into the land of Moriah; and offer him there for a burnt offering upon one of the mountains which I will tell you of.

3 And Abraham rose up early in the morning, and saddled his ass, and took two of his young men with him, and Isaac his son, and clave the wood for the burnt offering, and rose up, and went unto the place of which Elohim had told him.

4 Then on the third day Abraham lifted up his eyes, and saw the place afar off.

5 And Abraham said unto his young men, Abide ye here with the ass; and I and the lad will go yonder and worship, and come again to you.

6 And Abraham took the wood of the burnt offering, and laid upon Isaac his son; and he took the fire in his hand, and a knife; and they went both of them together.