When Isaac grew up, quarrels broke out between him and Ishmael, on account of the rights of the first-born. Ishmael insisted he should receive a double portion of the inheritance after the death of Abraham, and Isaac should receive only one portion. Ishmael, who had been accustomed from his youth to use the bow and arrow, was in the habit of aiming his missiles in the direction of Isaac, saying at the same time that he was but jesting.
Sarah, however, insisted that Abraham make over to Isaac all he owned, that no disputes might arise after his death, "for," she said, "Ishmael is not worthy of being heir with my son, nor with a man like Isaac, and certainly not with my son Isaac." Furthermore, Sarah insisted that Abraham divorce himself from Hagar, the mother of Ishmael, and send away the woman and her son, so that there be naught in common between them and her own son, either in this world or in the future world.