concubine
Genesis 16:3
And Sarai Abram's wife took Hagar her maid the Egyptian, after Abram had dwelt ten years in the land of Canaan, and gave her to her husband Abram to be his wife.
Genesis 25:6
But unto the sons of the concubines, which Abraham had, Abraham gave gifts, and sent them away from Isaac his son, while he yet lived, eastward, unto the east country.
Proverbs 15:25
The LORD will destroy the house of the proud: but he will establish the border of the widow.