Genesis 37:2
These are the generations of Jacob. Joseph, being seventeen years old, was feeding the flock with his brothers; and the lad was with the sons of Bilhah, and with the sons of Zilpah, his father's wives: and Joseph brought to his father their evil report.
Nave's Topical Index

Judges 19:3-5
And her husband arose, and went after her, to speak friendly to her, and to bring her again, having his servant with him, and a couple of asses: and she brought him into her father's house: and when the father of the damsel saw him, he rejoiced to meet him.
Nave's Topical Index

Mothers, Daughters, and Wives in Israel
... argues in the contrary direction, and concerning a far ... regarded a marriage as merely
legalised concubinage (Cheth ... the marriage vow, but of the laws and customs ...
/.../edersheim/sketches of jewish social life/chapter 9 mothers daughters and.htm

Doctrinal and Moral Treatises. Index of Subjects.
... Concubinage, for offspring's sake unlawful, [904]406; was ... Dwelling called "sitting,"
[1110]373. ... self-existent, [1184]385; Manich??an errors concerning, [1185]385 ...
/.../on care to be had for the dead /doctrinal and moral treatises index.htm

What is a concubine? Why did God allow men to have concubines in the Bible? | GotQuestions.org

How many wives did Abraham have? | GotQuestions.org

Concubinage: Dictionary and Thesaurus | Clyx.com

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