Genesis 21:8-14

The child grew and was weaned, and Abraham held a great feast on the day Isaac was weaned. But Sarah saw the son mocking — the one Hagar the Egyptian had borne to Abraham. So she said to Abraham, “Drive out this slave with her son, for the son of this slave will not be a coheir with my son Isaac!” This was very distressing to Abraham because of his son. But God said to Abraham, “Do not be distressed about the boy and about your slave. Whatever Sarah says to you, listen to her, because your offspring will be traced through Isaac, and I will also make a nation of the slave’s son because he is your offspring.” Early in the morning Abraham got up, took bread and a waterskin, put them on Hagar’s shoulders, and sent her and the boy away. She left and wandered in the Wilderness of Beer-sheba.