'Mistresses' in the Bible

Under the influence of wine, Belshazzar ordered that the gold and silver vessels his grandfather Nebuchadnezzar had taken from the Temple in Jerusalem be brought in so the king, his officials, his wives, and his mistresses could drink from them.

As ordered, they brought in the gold vessels that had been taken from the sanctuary of God's Temple in Jerusalem, and the king, his officials, his wives, and mistresses drank from them.

"You've exalted yourself against the Lord of heaven. "You've had the vessels from his Temple brought into your presence. "And you, your officials, and your wives and mistresses drank wine from them. "You praised gods of silver, gold, bronze, iron, wood, and stone, which can't see, hear, or demonstrate knowledge. "But you didn't honor God, who holds in his power your very life and all your ways.