21:4 And Abraham circumcised his son Isaac being eight days old, as
God had commanded him.

21:5 And Abraham was an hundred years old, when his son Isaac was born
unto him.

21:6 And Sarah said, God hath made me to laugh, so that all that hear
will laugh with me.

21:7 And she said, Who would have said unto Abraham, that Sarah should
have given children suck? for I have born him a son in his old age.

21:8 And the child grew, and was weaned: and Abraham made a great
feast the same day that Isaac was weaned.

21:9 And Sarah saw the son of Hagar the Egyptian, which she had born
unto Abraham, mocking.

21:10 Wherefore she said unto Abraham, Cast out this bondwoman and her
son: for the son of this bondwoman shall not be heir with my son, even
with Isaac.

21:11 And the thing was very grievous in Abraham's sight because of
his son.

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.