Jerome : (Verse 17) Who brought out the chariot and horse, the army and the strong: they lay down to sleep together, they will not rise again; they are broken like flax, they are extinguished. LXX: Who brings out chariots and horses, and a multitude of warriors. But they lie down, they shall not rise; they are extinguished, extinguished like flax. He submerged Pharaoh's chariots, horses, and entire army in the depths, who slept an eternal sleep. They were crushed and annihilated, like flax in a short span of time, and in an instant. For flax, even before being consumed by fire, is immediately extinguished due to its light substance, and dissolves into ashes. — Commentary on Isaiah