3 And David came to his house at Jerusalem; and the king took the ten women his concubines, whom he had left to keep the house, and put them in ward, and fed them, but went not in unto them. So they were shut up unto the day of their death, living in widowhood.
2 Samuel 20:3 Cross References - KJV
3 And he put them in ward in the house of the captain of the guard, into the prison, the place where Joseph was bound.
16 And the king went forth, and all his household after him. And the king left ten women, which were concubines, to keep the house.
21 And Ahithophel said unto Absalom, Go in unto thy father's concubines, which he hath left to keep the house; and all Israel shall hear that thou art abhorred of thy father: then shall the hands of all that are with thee be strong. 22 So they spread Absalom a tent upon the top of the house; and Absalom went in unto his father's concubines in the sight of all Israel.