That the waters may come - A sudden cessation of the wind, possibly coinciding with a spring tide (it was full moon) would immediately convert the low flat sand-banks first into a quicksand, and then into a mass of waters, in a time far less than would suffice for the escape of a single chariot, or horseman loaded with heavy corslet.

And the Lord said unto Moses,.... Out of the pillar of fire and of the cloud, when the Egyptians were in all the confusion before described, and about to make the best of their way back again:

Stretch out thine hand over the sea; with his rod in it, by which all the wonders were wrought, and particularly by which the sea had been divided, and now it must be used to a different purpose:

that the waters may come again upon the Egyptians, upon their chariots, and upon their horsemen; the waters which stood upright as a wall, on the right and left, might be no longer kept in such a position, but fall down upon the Egyptians, their chariots and horsemen, being higher than they.

Then God directed Moses to stretch out his staff again over the sea, and the sea came back with the turning of the morning (when the morning turned, or approached) to its position (איתן perennitas, the lasting or permanent position), and the Egyptians were flying to meet it. "When the east wind which divided the sea ceased to blow, the sea from the north and south began to flow together on the western side;" whereupon, to judge from Exo 15:10, the wind began immediately to blow from the west, and drove the waves in the face of the flying Egyptians. "And thus Jehovah shook the Egyptians (i.e., plunged them into the greatest confusion) in the midst of the sea," so that Pharaoh's chariots and horsemen, to the very last man, were buried in the waves.

And the LORD said unto Moses, Stretch out thine hand over the sea, that the waters may come again upon the Egyptians, upon their chariots, and upon their horsemen.

14:26 And the Lord said unto Moses, Stretch out thy hand over the sea - And give a signal to the waters to close again, as before upon the word of command they had opened to the right and the left. He did so, and immediately the waters returned to their place, and overwhelmed all the host of the Egyptians. Pharaoh and his servants, that had hardened one another in sin, now fell together, and not one escaped. An ancient tradition saith, That Pharaoh's magicians Jannes and Jambres perished with the rest. Now God got him honour upon Pharaoh, a rebel to God, and a slave to his own barbarous passions; perfectly lost to humanity, virtue, and all true honour; here be lies buried in the deep, a perpetual monument of divine justice: here he went down to the pit, though he was the terror of the mighty in the land of the living.

14:21-31 The dividing the Red sea was the terror of the Canaanites, Jos 2:9; the praise and triumph of the Israelites, Ps 114:3; 106:9; 136:13. It was a type of baptism, 1Co 10:1,2. Israel's passage through it was typical of the conversion of souls, Isa 11:15; and the Egyptians being drowned in it was typical of the final ruin of all unrepenting sinners. God showed his almighty power, by opening a passage through the waters, some miles over. God can bring his people through the greatest difficulties, and force a way where he does not find it. It was an instance of his wonderful favour to his Israel. They went through the sea, they walked upon dry land in the midst of the sea. This was done, in order to encourage God's people in all ages to trust him in the greatest straits. What cannot he do who did this? What will not he do for those that fear and love him, who did this for these murmuring, unbelieving Israelites? Then followed the just and righteous wrath of God upon his and his people's enemies. The ruin of sinners is brought on by their own rage and presumption. They might have let Israel alone, and would not; now they would flee from the face of Israel, and cannot. Men will not be convinced, till it is too late, that those who meddle with God's people, meddle to their own hurt. Moses was ordered to stretch out his hand over the sea; the waters returned, and overwhelmed all the host of the Egyptians. Pharaoh and his servants, who had hardened one another in sin, now fell together, not one escaped. The Israelites saw the Egyptians dead upon the sands. The sight very much affected them. While men see God's works, and feel the benefit, they fear him and trust in him. How well were it for us, if we were always in as good a frame as sometimes! Behold the end to which a Christian may look forward. His enemies rage, and are mighty; but while he holds fast by God, he shall pass the waves in safety guarded by that very power of his Saviour, which shall come down on every spiritual foe. The enemies of his soul whom he hath seen to-day, he shall see no more for ever.