Genesis 21:10 BBE

⁸  And when the child was old enough to be taken from the breast, Abraham made a great feast.

⁹  And Sarah saw the son of Hagar the Egyptian playing with Isaac.

¹⁰  So she said to Abraham, Send away that woman and her son: for the son of that woman is not to have a part in the heritage with my son Isaac.

¹¹  And this was a great grief to Abraham because of his son.

¹²  But God said, Let it not be a grief to you because of the boy and Hagar his mother; give ear to whatever Sarah says to you, because it is from Isaac that your seed will take its name.