Genesis 21:14

And Abraham rose up early in the morning, and took bread and a bottle of water, and gave it unto Hagar, putting it on her shoulder and the child, and sent her away. And she departed and wandered in the wilderness of Beersheba. Abraham, as usual, lost no time in performing his duty, unpleasant as it was. Early the next morning he gave Hagar a supply of bread and a skin filled with water, and thereupon called Ishmael, then a lad of almost seventeen years. When these two had been dismissed, they wandered forth toward the southwest, probably with the intention of reaching the main caravan route toward Egypt. Thus the separation, which had to come sooner or later, had been effected.