So Sarai said to Abram, “See now, the Lord has prevented me from bearing children. Please have relations with my slave woman; perhaps I will obtain children through her.” And Abram listened to the voice of Sarai.
but to the sons of his concubines, Abraham gave gifts while he was still living, and sent them away from his son Isaac eastward, to the land of the east.
And it came about, while Israel was living in that land, that Reuben went and slept with his father’s concubine Bilhah, and Israel heard about it. Now there were twelve sons of Jacob—
This is what the Lord says: ‘Behold, I am going to raise up evil against you from your own household; I will even take your wives before your eyes and give them to your companion, and he will sleep with your wives in broad daylight.