Exodus 14:25 - Matthew Poole's English Annotations on the Holy Bible

Took off their chariot wheels; either burning them with lightning, or tearing them in pieces with thunder-bolts, or loosening them, and making them to fall off. That they drave them heavily; Heb. and he made him, or them, the singular number for the plural, i.e. the Egyptians, or their chariots, to go heavily, hardly and slowly, either for want of wheels, or for breaches in them, or because the rain had softened the bottom of the sea, or because the lightnings and thunders affrighted and dispirited their horses. For the Lord fighteth for them. Prodigious stupidity! They did not understand and consider this, though it was notorious, to them especially, by many great and fresh instances, till it was too late to prevent it; therein being a type of most sinners, who will not be convinced, nor repent, till they be past all benefit by it.