Judges 16:17-19

17Finally, Samson shared his secret with her. “My hair has never been cut,” he confessed, “for I was dedicated to God as a Nazirite from birth. If my head were shaved, my strength would leave me, and I would become as weak as anyone else.”

18Delilah realized he had finally told her the truth, so she sent for the Philistine rulers. “Come back one more time,” she said, “for he has finally told me his secret.” So the Philistine rulers returned with the money in their hands.

19Delilah lulled Samson to sleep with his head in her lap, and then she called in a man to shave off the seven locks of his hair. In this way she began to bring him down, and his strength left him.