And the children of Israel went into the midst of the sea upon the dry ground: and the waters were a wall unto them on their right hand, and on their left.

Jamieson-Fausset-Brown Bible Commentary

22. the children of Israel went into the midst of the sea, &c.-It is highly probable that Moses, along with Aaron, first planted his footsteps on the untrodden sand, encouraging the people to follow him without fear of the treacherous walls; and when we take into account the multitudes that followed him, the immense number who through infancy and old age were incapable of hastening their movements, together with all the appurtenances of the camp, the strong and steadfast character of the leaders' faith was strikingly manifested (Jos 2:10; 4:23; Ps 66:6; 74:13; 106:9; 136:13; Isa 63:11-13; 1Co 10:1; Heb 11:29).

Matthew Henry's Concise Commentary

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.