Judges 16:17

16:17 Finally he told her his secret. He said to her, “My hair has never been cut, for I have been dedicated to God from the time I was conceived. If my head were shaved, my strength would leave me; I would become weak, and be just like all other men.”

Judges 16:20

16:20 She said, “The Philistines are here, Samson!” He woke up and thought, “I will do as I did before and shake myself free.” But he did not realize that the Lord had left him.