sons of abraham

God's promise for Israel

On arriving in the new land, God promised Abraham that He would give the land to his descendants (Genesis 12:7). "And the LORD said to Abram,... 'Lift your eyes now and look from the place where you are—northward, southward, eastward, and westward; for all the land which you see I give to you and your descendants forever'" (Genesis 13:14-15).

God's promise for Arab

But a divine message was given to Hagar, telling her to return. It also reassured her that her son would have many descendants—but descendants with traits that would be evident throughout their history: "I will so increase your descendants that they will be too numerous to count ... You are now with child and you will have a son. You shall name him Ishmael ['God hears'], for the LORD has heard of your misery. He will be a wild donkey of a man; his hand will be against everyone and everyone's hand against him, and he will live in hostility toward all his brothers" (verses 10-12, New International Version).

Fourteen years after the birth of Ishmael, God blessed Abraham with another son, this time by his wife Sarah. He told them to name their son Isaac (meaning "laughter" for the incredulous reaction they had when told they would have a son at their advanced age as well as the joy that he would later bring to his parents, Genesis 17:17, 19; 18:10-15; 21:5-6). Isaac in turn fathered Jacob, also named Israel, the father of the Israelites. Ishmael's and Isaac's descendants are therefore cousins.

"So the child [Isaac] grew and was weaned. And Abraham made a great feast on the same day that Isaac was weaned. And Sarah saw the son of Hagar the Egyptian, whom she had borne to Abraham, scoffing. Therefore she said to Abraham, 'Cast out this bondwoman and her son; for the son of this bondwoman shall not be heir with my son, namely with Isaac'" (Genesis 21:8-10).

This displeased Abraham, who had grown to love Ishmael. "But God said to Abraham, '... Whatever Sarah has said to you, listen to her voice; for in Isaac your seed shall be called" (verse 12). God further reassured Abraham: "Yet I will also make a nation of the son of the bondwoman [Ishmael], because he is your seed" (verse 13). "So God was with the lad; and he grew and dwelt in the wilderness ..." (verse 20).

It cannot be said that Ishmael hated Isaac. But after 14 years as an only child, Isaac's arrival fundamentally changed Ishmael's relationship with his father Abraham. Afterward, Ishmael felt envy and rivalry toward his half-brother, feelings that tribally have survived down through the centuries and which affect the politics of the Middle East today.