Gen 21:8-14

The child grew and was weaned, and Abraham held a great banquet on the day of the child’s weaning.

Sarah noticed the son whom Hagar the Egyptian had borne to Abraham playing with her son Isaac; so she demanded of Abraham: “Drive out that slave and her son! No son of that slave is going to share the inheritance with my son Isaac!” Abraham was greatly distressed because it concerned a son of his. But God said to Abraham: Do not be distressed about the boy or about your slave woman. Obey Sarah, no matter what she asks of you; for it is through Isaac that descendants will bear your name. As for the son of the slave woman, I will make a nation of him also, since he too is your offspring.

Early the next morning Abraham got some bread and a skin of water and gave them to Hagar. Then, placing the child on her back, he sent her away. As she roamed aimlessly in the wilderness of Beer-sheba,