So Sarai, Abram’s wife, took Hagar the Egyptian servant and gave her to Abram as a wife. (This happened ten years after Abram had settled in the land of Canaan.)
So Abram had sexual relations with Hagar, and she became pregnant. But when Hagar knew she was pregnant, she began to treat her mistress, Sarai, with contempt.
Then Sarai said to Abram, “This is all your fault! I put my servant into your arms, but now that she’s pregnant she treats me with contempt. The Lord will show who’s wrong—you or me!”
So Esau visited his uncle Ishmael’s family and married one of Ishmael’s daughters, in addition to the wives he already had. His new wife’s name was Mahalath. She was the sister of Nebaioth and the daughter of Ishmael, Abraham’s son.
While he was living there, Reuben had intercourse with Bilhah, his father’s concubine, and Jacob soon heard about it. These are the names of the twelve sons of Jacob: