2 Samuel 20:3
And David will come to his house to Jerusalem; and the king will take the ten women, the concubines which he left to watch the house, and he will give them to the house of watch, and he will nourish them, and he went not in to them. And they will be bound together till the day of their death to live widows.
2 Samuel 15:16
And the king will go forth, and all his house at his feet. And the king will leave ten women, concubines, to watch the house.
2 Samuel 16:21-22
And Ahithophel will say to Absalom, Come in to thy father's concubines which he left to watch the house; and all Israel hearing that thou madest thy father loathsome, and the hands of all that are with thee were strengthened.
Genesis 40:3
And he will give them in guard in the house of the chief of the cooks, to the house of the fortress, the place where Joseph was bound there.