2 Samuel 20:3
David went up to his house in Jerusalem, then the king took the ten concubines whom he had left to look after the house, and he put them {under confinement}. However, he provided for them, but {he did not sleep with them}. So they were confined until the day of their death, like a lifetime of widowhood.
2 Samuel 15:16
The king went out with all his household {following him}, but the king left behind ten concubines to look after the house.
2 Samuel 16:21-22
And Ahithophel said to Absalom, "Go to the concubines of your father whom he left behind to watch over the house, then all of Israel will hear that you made yourself odious to your father, and {all of your followers will be motivated}!"
Genesis 40:3
And he put them in custody in the house of the chief of the guard, into the prison where Joseph was confined.