'Thread' in the Bible

They hid in the bedroom and then she said to him, "The Philistines are here, Samson!" He snapped the bowstrings as easily as a thread of yarn snaps when it is put close to fire. The secret of his strength was not discovered.

So Delilah took new ropes and tied him with them and said to him, "The Philistines are here, Samson!" (The Philistines were hiding in the bedroom.) But he tore the ropes from his arms as if they were a piece of thread.