Genesis 21:8 in the World English Bible
The child grew and was weaned. Abraham made a great feast on the day that Isaac was weaned.
Context
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.
8 And the child grew, and was weaned: and Abraham made a great feast the same day that Isaac was weaned.
9 And Sarah saw the son of Hagar the Egyptian, which she had born unto Abraham, mocking.