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

11:17 By faith Abraham, when he was tested, offered up Isaac. He had received the promises, ¹  yet he was ready to offer up ²  his only son.

[11:17]  ¹ tn Here “received the promises” refers to the pledges themselves, not to the things God promised.

[11:17]  ² tn Grk “he was offering up.” The tense of this verb indicates the attempt or readiness to sacrifice Isaac without the actual completion of the deed.