When Abraham was nearly one hundred years old, the promise of a son was repeated to him, with the assurance that the future heir should be the child of Sarah. But Abraham did not yet understand the promise. His mind at once turned to Ishmael, clinging to the belief that through him God’s gracious purposes were to be accomplished. In his affection for his son he exclaimed, “O that Ishmael might live before Thee!” Genesis 17:18. Again the promise was given, in words that could not be mistaken: “Sarah thy wife shall bear thee a son indeed; and thou shalt call his name Isaac: and I will establish My covenant with him.” Genesis 17:19. Yet God was not unmindful of the father’s prayer. “As for Ishmael,” He said, “I have heard thee: Behold, I have blessed him, ... and I will make him a great nation.” Genesis 17:20. (PP 146.1) MC VC

The birth of Isaac, bringing, after a lifelong waiting, the fulfillment of their dearest hopes, filled the tents of Abraham and Sarah with gladness. But to Hagar this event was the overthrow of her fondly cherished ambitions. Ishmael, now a youth, had been regarded by all in the encampment as the heir of Abraham’s wealth and the inheritor of the blessings promised to his descendants. Now he was suddenly set aside; and in their disappointment, mother and son hated the child of Sarah. The general rejoicing increased their jealousy, until Ishmael dared openly to mock the heir of God’s promise. Sarah saw in Ishmael’s turbulent disposition a perpetual source of discord, and she appealed to Abraham, urging that Hagar and Ishmael be sent away from the encampment. The patriarch was thrown into great distress. How could he banish Ishmael his son, still dearly beloved? In his perplexity he pleaded for divine guidance. The Lord, through a holy angel, directed him to grant Sarah’s desire; his love for Ishmael or Hagar ought not to stand in the way, for only thus could he restore harmony and happiness to his family. And the angel gave him the consoling promise that though separated from his father’s home, Ishmael should not be forsaken by God; his life should be preserved, and he should become the father of a great nation. Abraham obeyed the angel’s word, but it was not without keen suffering. The father’s heart was heavy with unspoken grief as he sent away Hagar and his son. (PP 146.2) MC VC