Genesis 36:12
And Timna was concubine to Eliphaz Esau's son; and she bore to Eliphaz Amalek: these were the sons of Adah Esau's wife.
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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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