Rom 9:7-9, Heb 11:11, 17-18 | ESV | STEP | and not all are children of Abraham because they are his offspring , but Through Isaac shall your offspring be named .

Romans 9:7-9

7 and not all are children of Abraham ^abecause they are his offspring, but ^b“Through Isaac shall your offspring be named.” 8 This means that it is not the children of the flesh who are the children of God, but ^cthe children of the promise are counted as offspring. 9 For this is what the promise said: ^d“About this time next year I will return, and Sarah shall have a son.”

Hebrews 11:11

11 By faith ^eSarah herself received power to conceive, even when she was past the age, since she considered ^fhim faithful who had promised.

Hebrews 11:17-18

17 By faith ^gAbraham, when he was tested, offered up Isaac, and he who had received the promises was in the act of offering up his only son, 18 of whom it was said, ^h“Through Isaac shall your offspring be named.”