Judges 16:9

And so, those hiding in ambush with her, in the bedroom, were expecting the end of the matter. And she cried out to him, "The Philistines are upon you, Samson!" And he broke the cords, as one would break a thread of flax, twisted for cutting and singed by fire. And so it was not known wherein lay his strength

Other versions

King James Version

Now there were men lying in wait, abiding with her in the chamber. And she said unto him, The Philistines be upon thee, Samson. And he brake the withs, as a thread of tow is broken when it toucheth the fire. So his strength was not known.

English Standard Version

Now she had men lying in ambush in an inner chamber. And she said to him, "The Philistines are upon you, Samson!" But he snapped the bowstrings, as a thread of flax snaps when it touches the fire. So the secret of his strength was not known.

New International Version

With men hidden in the room, she called to him, "Samson, the Philistines are upon you!" But he snapped the thongs as easily as a piece of string snaps when it comes close to a flame. So the secret of his strength was not discovered.