Now Sarai, Abram’s wife, bore him no children. She had an Egyptian slave-girl whose name was Haggar, and Sarai said to Abram, "You see that the LORD has prevented me from bearing children; go into to my slave-girl; it may be that I shall obtain children by her." And Abram listened to the voice of Sarai. So, after Abram had lived ten years in the land of Canaan, Sarai, Abram’s wife, took Hagar the Egyptian, her slave-girl, and gave her to her husband Abram as a wife. He went in to Hagar, and she conceived; and when she saw that she had conceived, she looked with contempt on her mistress. Then Sarai said to Abram, "May the wrong done to me be on you! I gave my slave-girl to your embrace, and when she saw that she had conceived, she looked on me with contempt. May the LORD judge between you and me!"

Genesis 16:1-5

And the angel of the LORD said to her, "Now you have conceived and shall bear a son; you shall call him Ishmael," for the LORD has given heed to your affliction. He shall be a wild ass of a man, with his hand against everyone, and everyone’s hand against him; and he shall live at odds with all his kin."

Genesis 16:11-12

Hagar bore Abram a son; and Abram named his son, whom Hagar bore, Ishmael. Abram was eighty-six years old when Hagar bore him Ishmael.

When Abram was ninety-nine years old, the LORD appeared to Abram, and said to him, "I am God Almighty; walk before me, and be blameless. And I will make my covenant between me and you, and will make you exceedingly numerous." Then Abram fell on his face; and God said to him, "As for me, this is my covenant with you: You shall be the ancestor of a multitude of nations. No longer shall your name be Abram, but your name shall be Abraham; for I have made you the ancestor of a multitude of nations…"

Genesis 16:15 – 17:5

And Abraham said to God, "O that Ishmael might live in your sight!" God said, "No, but your wife Sarah shall bear you a son, and you shall name him Isaac. I will establish my covenant with him as an everlasting covenant for his offspring after him. As for Ishmael, I have heard you; I will bless him and make him fruitful and exceedingly numerous; he shall be the father of twelve princes, and I will make him a great nation. But my covenant I will establish with Isaac, whom Sarah shall bear to you at this season next year." And when he had finished talking with him, God went up from Abraham.

Genesis 17:18-22