Gen 17:19, 21, Rom 9:7-8, Heb 11:18 | ESV | STEP | God said , No , but Sarah your wife shall bear you a son , and you shall call his name Isaac . I will establish my covenant with him as an everlasting covenant for his offspring after him.

Genesis 17:19

19 God said, “No, but ^aSarah your wife shall bear you a son, and you shall call his name ^bIsaac. ^{▼▼ Isaac means he laughs} I will establish my covenant with him as an everlasting covenant for his offspring after him.

Genesis 17:21

21 But ^dI will establish my covenant with Isaac, ^ewhom Sarah shall bear to you at this time next year.”

Romans 9:7-8

7 and not all are children of Abraham ^fbecause they are his offspring, but ^g“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 ^hthe children of the promise are counted as offspring.

Hebrews 11:18

18 of whom it was said, ⁱ“Through Isaac shall your offspring be named.”