Leviticus 18:18
And thou shall not take a wife in addition to her sister, to be a rival [to her], to uncover her nakedness, besides the other in her life-time.
Genesis 4:19
And Lamech took to him two wives. The name of the one was Adah, and the name of the other Zillah.
Genesis 29:28
And Jacob did so, and fulfilled her week. And he gave him Rachel his daughter to wife.
Genesis 30:15
And she said to her, Is it a small matter that thou have taken away my husband? And would thou take away my son's mandrakes also? And Rachel said, Therefore he shall lay with thee tonight for thy son's mandrakes.
Exodus 26:3
Five curtains shall be coupled together one to another, and [the other] five curtains shall be coupled one to another.
1 Samuel 1:6-8
And her rival provoked her greatly, to make her fret, because LORD had shut up her womb.
Malachi 2:15
And did he not make one, although he had the residue of the Spirit? And why one? He sought a godly seed. Therefore take heed to your spirit, and let none deal treacherously against the wife of his youth.