Hebrews 11:11

11:11 By faith, even though Sarah herself was barren and he was too old, he received the ability to procreate, because he regarded the one who had given the promise to be trustworthy.

Hebrews 11:17-18

11:17 By faith Abraham, when he was tested, offered up Isaac. He had received the promises, yet he was ready to offer up his only son. 11:18 God had told him, “Through Isaac descendants will carry on your name,”