2 Samuel 14:10-11

10 The king replied, “If anyone says anything to you, bring him to me, and he will not bother you again.”

11 She said, “Then let the king invoke the Lord his God to prevent the avenger of blood from adding to the destruction, so that my son will not be destroyed.”
“As surely as the Lord lives,” he said, “not one hair of your son’s head will fall to the ground.”