Delilah attempts to trap Samson the first time
Delilah asked Samson to tell her the secret of his strength. He lied and said it was being bound with seven bowstrings.
Key passages
Jdg 16:4

After this he fell in love with a woman in the wadi of Sorek, and her name was Delilah.

Jdg 16:6–9

So Delilah said to Samson, “Please tell me what makes your strength so great, and with what can you be tied up to subdue you?” Samson said to her, “If you tie me up with seven fresh bowstrings that are not dried up, I will become weak like everyone else.” So the rulers of the Philistines brought …

See also
Important Things