2 Samuel 14:11

14:11 She replied, “In that case, let the king invoke the name of the Lord your God so that the avenger of blood may not kill! Then they will not destroy my son!” He replied, “As surely as the Lord lives, not a single hair of your son’s head will fall to the ground.”

2 Samuel 20:3

20:3 Then David went to his palace in Jerusalem. The king took the ten concubines he had left to care for the palace and placed them under confinement. Though he provided for their needs, he did not have sexual relations with them. They remained in confinement until the day they died, living out the rest of their lives as widows.