18 as to whom it had been said, In Isaac shall thy seed be called:
Hebrews 11:18 Cross References - Darby
Genesis 17:19
19 And God said, Sarah thy wife shall indeed bear thee a son; and thou shalt call his name Isaac; and I will establish my covenant with him, for an everlasting covenant for his seed after him.
Genesis 21:12
12 And God said to Abraham, Let it not be grievous in thy sight because of the lad and because of thy handmaid: [in] all that Sarah hath said to thee hearken to her voice, for in Isaac shall a seed be called to thee.
Romans 9:7
7 nor because they are seed of Abraham [are] all children: but, In Isaac shall a seed be called to thee.