Judges 16:6-10

So Delilah said to Samson, “Please tell me where your great strength lies, and how you can be bound to humble you.”

And Samson said to her, “If they bind me with seven fresh animal tendons that have not been dried, then I will become weak and be like any other man.”

Then the governors of the Philistines brought up to her seven fresh animal tendons that had not been dried, and she bound him with them.

Now she had men prepared for an ambush in an inner room. And she said to him, “The Philistines are upon you, Samson!” But he tore the tendons to pieces just like a thread of flax is torn apart when it comes too close to fire. So his strength was not discovered.

Then Delilah said to Samson, “Behold, you have toyed with me and told me lies; now please tell me how you may be bound.”