Genesis says Sarah demanded that Hagar's son "shall not be heir with my son," and Abraham sent mother and child into the desert

Genesis says Abraham had a son, Ishmael, by Hagar, an Egyptian slave woman, and later a son, Isaac, by his wife Sarah. At the feast for Isaac's weaning, Sarah saw Ishmael "making sport." She told Abraham to cast out the bondwoman and her son, because "the son of this bondwoman shall not be heir with my son, even with Isaac." Abraham was grieved. God told him to listen to Sarah. The next morning Abraham gave Hagar bread and a bottle of water and sent her away with the boy. In the wilderness of Beersheba the water ran out. She left the child under a shrub. An angel called to her and she found a well. Ishmael grew up an archer in the wilderness of Paran and married an Egyptian. Genesis 25 says Abraham "gave all that he had unto Isaac." To the sons of his concubines he gave gifts and sent them east while he was still alive. Isaac and Ishmael buried him in the cave of Machpelah. Babylon's Laws of Hammurabi gave a slave woman's sons an equal share only if their father had called them "my sons"; otherwise they received their freedom and nothing else. In Islamic tradition, recorded by al-Bukhari, Abraham left Hagar and the infant at the valley of Mecca with dates and a waterskin. She ran seven times between the hills of Safa and Marwa, and the spring of Zamzam appeared. Ishmael grew up there among the Jurhum tribe.