TSK · Genesis 21:3

And God said, Sarah thy wife shall bear thee a son indeed; and thou shalt call his name Isaac: and I will establish my covenant with him for an everlasting covenant, [and] with his seed after him.

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.

¶ And these [are] the generations of Isaac, Abraham's son: Abraham begat Isaac:

Abraham begat Isaac; and Isaac begat Jacob; and Jacob begat Judas and his brethren;

Neither, because they are the seed of Abraham, [are they] all children: but, In Isaac shall thy seed be called.