Judges 16:7-9

7Samson told her, “If they tie me up with seven fresh bowstrings that have not been dried, I will become weak and be like any other man.”

8The Philistine leaders brought her seven fresh bowstrings that had not been dried, and she tied him up with them.

9While the men in ambush were waiting in her room, she called out to him, “Samson, the Philistines are here!” But he snapped the bowstrings as a strand of yarn snaps when it touches fire. The secret of his strength remained unknown.