Samson said to her, If they bind me with seven green cords that were never dried, then shall I become weak, and be as another man.
"The Philistines are upon thee, Samson"  (Judges 16:9).  Delilah was only pretending in this exclamation in order to find out if Samson had really told her the truth.  The liers-in-wait were not called until she knew that she had Samson in her power.  Samson was only playing games with her, but it was a deadly game that eventually cost him his eyesight and his life.