What happensPermalink
Isaac is finally born. Sarah has Hagar and Ishmael thrown out, but God rescues them, and Ishmael grows up. Abraham makes a treaty with Abimelech.
Why it mattersPermalink
God fulfills two promises: to Abraham and Sarah, that she would bear a true son; and to Ishmael, that he would also inherit the promises God made to Abraham.
Key versePermalink
Abraham called the name of his son who was born to him, whom Sarah bore him, Isaac.