Then Sarai said to Abram, “It’s your fault that I’m suffering like this. I put my slave in your arms. Now that she knows she’s pregnant, she looks down on me. May the Lord judge between you and me. May he decide which of us is right.”
But while he was still living, he gave gifts to the sons of his concubines. Then he sent them away from his son Isaac. He sent them to the land of the east.
So he went to Ishmael and married Mahalath. She was the sister of Nebaioth and the daughter of Abraham’s son Ishmael. Esau added her to the wives he already had.
While Israel was living in that area, Reuben went in and slept with Bilhah. She was the concubine of Reuben’s father. And Israel heard about it. Here are the 12 sons Jacob had.