Genesis 30:4
So Rachel gave him her servant Bilhah as a wife, and Jacob had marital relations with her.
Genesis 16:3-4
So after Abram had lived in Canaan for ten years, Sarai, Abram's wife, gave Hagar, her Egyptian servant, to her husband to be his wife.
Genesis 21:10
So she said to Abraham, "Banish that slave woman and her son, for the son of that slave woman will not be an heir along with my son Isaac!"
Genesis 22:24
His concubine, whose name was Reumah, also bore him children -- Tebah, Gaham, Tahash, and Maacah.
Genesis 25:1
Abraham had taken another wife, named Keturah.
Genesis 25:6
But while he was still alive, Abraham gave gifts to the sons of his concubines and sent them off to the east, away from his son Isaac.
Genesis 33:2
He put the servants and their children in front, with Leah and her children behind them, and Rachel and Joseph behind them.
Genesis 35:22
While Israel was living in that land, Reuben had sexual relations with Bilhah, his father's concubine, and Israel heard about it. Jacob had twelve sons:
2 Samuel 12:11
This is what the Lord says: 'I am about to bring disaster on you from inside your own household! Right before your eyes I will take your wives and hand them over to your companion. He will have sexual relations with your wives in broad daylight!