So she gave Hagar to him to be his concubine. (This happened after Abram had lived in Canaan for ten years.)

Sarah saw them and said to Abraham, "Send this slave and her son away. The son of this woman must not get any part of your wealth, which my son Isaac should inherit."

Reumah, Nahor's concubine, bore Tebah, Gaham, Tahash, and Maacah.

Abraham married another woman, whose name was Keturah.

but while he was still alive, he gave presents to the sons his other wives had borne him. Then he sent these sons to the land of the East, away from his son Isaac.

He put the concubines and their children first, then Leah and her children, and finally Rachel and Joseph at the rear.

While Jacob was living in that land, Reuben had sexual intercourse with Bilhah, one of his father's concubines; Jacob heard about it and was furious. Jacob had twelve sons.

I swear to you that I will cause someone from your own family to bring trouble on you. You will see it when I take your wives from you and give them to another man; and he will have intercourse with them in broad daylight.