Treasury of Scripture Knowledge

Summary

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.

Bible References

In isaac

Romans 9:7
neither are they who are the race of Abraham, all children: but 'tis said, "in Isaac shall thy posterity be called."
Hebrews 11:18
of whom it was said, "only the descendants of Isaac shall be counted your posterity:"