'Flax' in the Bible

As he came up to Lehi, [the] Philistines came shouting to meet him; and the Spirit of Yahweh rushed on him, and the ropes that [were] on his arms became like flax that has burned with fire, and his bindings melted from his hands.

The ambush [was] sitting [in wait] for her in an inner room. And she said to him, "[The] Philistines [are] upon you Samson!" And he snapped the bowstrings just as flax fiber snaps when it comes close to fire. And [the secret of] his strength remained unknown.