Hebrews 11:17-20

By faith Abraham, when he was tested, offered up Isaac, and he who had received the promises was offering up his only begotten son; it was he to whom it was said, “IN ISAAC YOUR DESCENDANTS SHALL BE CALLED.” He considered that God is able to raise people even from the dead, from which he also received him back as a type. By faith Isaac blessed Jacob and Esau, even regarding things to come.