concubine
Genesis 16:3
After Abram had lived ten years in the land of Canaan, Abram's wife Sarai took Hagar the Egyptian, her maid, and gave her to her husband Abram as his wife.
Genesis 25:6
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.
Proverbs 15:25
The LORD will tear down the house of the proud, But He will establish the boundary of the widow.