פִּלֶ֫גֶשׁ

The sons born to Keturah, Abraham’s concubine:Zimran, Jokshan, Medan, Midian, Ishbak, and Shuah.The sons of Jokshan:Sheba and Dedan.

Rehoboam loved Maacah daughter of Absalom more than all his wives and concubines. In all, he had eighteen wives and sixty concubines, and he was the father of twenty-eight sons and sixty daughters.

Meanwhile, Saul had a concubine named Rizpah, the daughter of Aiah. So Ish-bosheth questioned Abner, “Why did you sleep with my father’s concubine?”

While Israel was living in that region, Reuben went in and slept with his father’s concubine Bilhah, and Israel heard about it.Jacob had twelve sons:

Look, let me bring out my virgin daughter and the man’s concubine, and you can use them and do with them as you wish. But do not do such a vile thing to this man.”