Hebrews 11:18-20

18God had said to Abraham, ‘It is through Isaac that your family will continue.’

19But Abraham was sure that, if Isaac died, God could raise Isaac to life again. We could even say that is a picture of what really happened. It was like Abraham did receive Isaac back from death.

20Isaac himself also believed God. As a result of his faith, he asked God to bless his sons, Jacob and Esau. He trusted that God would help them in the future time.