Hebrews 11:18
Even him of whom it had been said - In Isaac, shall there be called to thee, a seed:
Genesis 21:12
And God said unto Abraham Let it not be grievous in thine eyes concerning the boy and concerning thy bondwoman, In all that Sarah may say unto thee, hearken to her voice, - For in Isaac, shall there be called to thee - a seed.
Romans 9:7
Neither, because they are seed of Abraham, are all children, - but, In Isaac, shall there be called unto thee a seed.
Genesis 17:19
And God said - Truly, Sarah thy wife, is about to bear thee a son, and thou shalt call his name, Isaac, - and I will establish my covenant with him as an age-abiding covenant, to his seed after him.