Judges 16:9-12

She had hidden some men in one of the inner rooms of her house, and she cried out, “Samson! The Philistines have come to capture you!” But Samson snapped the bowstrings as a piece of string snaps when it is burned by a fire. So the secret of his strength was not discovered. Afterward Delilah said to him, “You’ve been making fun of me and telling me lies! Now please tell me how you can be tied up securely.” Samson replied, “If I were tied up with brand-new ropes that had never been used, I would become as weak as anyone else.” So Delilah took new ropes and tied him up with them. The men were hiding in the inner room as before, and again Delilah cried out, “Samson! The Philistines have come to capture you!” But again Samson snapped the ropes from his arms as if they were thread.