Hebrews 11:8

11:8 By faith Abraham obeyed when he was called to go out to a place he would later receive as an inheritance, and he went out without understanding where he was going.

Hebrews 11:17-19

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,” 11:19 and he reasoned that God could even raise him from the dead, and in a sense he received him back from there.