Exodus 14:28

And the waves of the sea returned, and covered the chariots, and the horsemen and all the host of Pharoh who had gone in after them, into the sea, not one among them was left.

AND THE WATERS RETURNED, AND COVERED THE CHARIOTS, AND THE HORSEMEN, ‘L’CHOL’ (TO ALL) THE HOST OF PHARAOH. “[The word l’chol should really have been kol without the letter lamed. However], it is the normal manner of expression of many verses to write a redundant lamed, as for example: ‘l’chol the instruments of the Tabernacle;, 27:19. Literally: ‘to all’ the instruments of the Tabernacle, but the meaning is “‘all’ the instruments.” ‘l’chol’ the vessels thereof thou shalt make of brass;, Verse 3. Literally: ‘to all’ the vessels, but the meaning is “‘all’ the vessels thereof.” It is only an elegance in Scriptural style.” Thus the language of Rashi.
But it is not so in this place. as being in apposition to all the host. Therefore Rashi had written that the lamed of l’chol is redundant, since the expression all the host is added by way of explanation. But Ramban interprets all the host to mean the people Pharaoh took with him besides the chariots and the horsemen. Therefore the lamed is not an idiomatic form here and is a necessary part of the verse, as is explained further in the text. Instead its meaning is as follows: “And the waters covered the chariots and the horsemen and all the in the word l’chol thus indicates the object, and is as if it were written “v’eth (and the) host of Pharaoh.” See my Hebrew commentary, p. 352. host of Pharaoh that went in after them into the sea.” The host is not identical with the chariots and the horsemen, [as is suggested by Rashi’s explanation], but rather they are his people that Pharaoh took with him, just as it is said above: all the horses and chariots of Pharaoh, and his horsemen, and his host., Verse 9. Here it is clear that the host is separate from the chariots and horsemen, since it says “and the host.” A similar usage of the letter lamed in connection with the term “covering” is found in these verses: As the waters cover ‘la’yam;’, but the meaning is “the sea.” And thou shalt make a covering ‘la’ohel.’, but it means “and thou shalt make ‘the tent’ a covering of….” The term “covering” also appears [in conjunction] with the word al, e.g., The fat that covereth ‘al’ the inwards., but the word al is understood as eth, a word which indicates the direct object. There are many cases like this.

וישובו המים in great waves to the newly created trough,

ויכסו את הרכב, after having shaken off the riders who had been driving these chariots.

ואת הפרשים, the riders of the cavalry.

לכל חיל פרעה הבאים אחריהם, the main body of chariots, foot- soldiers, etc, all who were not the elite but who had taken part in this war.

לא נשאר בהם עד אחד, “not a single one of them remained.” The word עד is sometimes used as inclusive statement whereas other times it is used as exclusion, i.e. in this instance the meaning is that only a single Egyptian survived this drowning. The survivor was Pharaoh himself. We read in Psalms 106,11: אחד מהם לא נותר, “not one of them was left.” How do we reconcile this? The Torah refers to all of Pharaoh’s soldiers having perished. He himself was forced to survive and bear the disgrace of his defeat.