Albert Barnes Commentary Exodus 14:13

"And Moses said unto the people, Fear ye not, stand still, and see the salvation of Jehovah, which he will work for you to-day: for the Egyptians whom ye have seen to-day, ye shall see them again no more for ever." — Exodus 14:13 (ASV)

For the Egyptians whom ... - The true sense is, you shall never see the Egyptians in the same way, under the same circumstances.