Genesis 21:12 Gen. 21:12
And God said unto Abraham, Let it not be grievous in thy sight because of the lad, and because of thy bondwoman; in all that Sarah hath said unto thee, hearken unto her voice; for in Isaac shall thy seed be called.
Romans 9:7 Rom. 9:7
Neither, because they are the seed of Abraham, are they all children: but, In Isaac shall thy seed be called.
(Quotation)