Genesis 21:14

Abraham rose up early in the morning Immediately, it seems, after he had received orders in the night visions to do this: and took bread and a bottle of water All necessary provision seems to be here included, of which it is probable they had sufficient to have served them till they had come to Hagar's friends in Egypt, if they had not lost their way. Ishmael, it is thought, was more than sixteen years of age at this time, yet the provisions were put upon Hagar's shoulders, as being more inured to labour, and the lad was committed to her care.