(15-18) Wherefore criest thou unto me?—Like the people (Exodus 14:10), Moses had cried to Jehovah, though he tells us of his cry only thus indirectly. God made answer that it was not a time to cry, but to act: “Speak unto the children of Israel, that they go forward,” &c. The Israelites were to strike their tents at once, and prepare for a forward movement. Moses was to descend to the edge of the sea, with his rod in his hand, and to stretch it out over the sea, and then await the consequences, which would be a “division” of the waters—the sea-bed would for a certain space become dry, and Israel would be able to cross to the other side (Exodus 14:16); the Egyptians would follow, and then destruction would come upon them, and God would “get himself honour upon Pharaoh, and upon all his host” (Exodus 14:17-18). The exact mode of the destruction was not announced.

Exodus 14:15. Wherefore criest thou to me? — Moses, though he was assured of a good issue, yet did not neglect prayer. We read not of one word he said in prayer, but he lifted up his heart to God, and God well understood, and took notice of it. Moses’s silent prayer prevailed more with God than Israel’s loud outcries. But is God displeased with Moses for praying? No; he asks this question, Wherefore criest thou unto me? Wherefore shouldest thou press thy petition any further, when it is already granted? Moses has something else to do besides praying; he is to command the hosts of Israel. Speak to them that they go forward — Some think Moses had prayed not so much for their deliverance, he was assured of that, as for the pardon of their murmurings: and God’s ordering them to go forward was an intimation of the pardon. Moses bid them stand still and expect orders from God: and now orders are given. They thought they must have been directed either to the right hand or to the left; no, saith God, speak to them to go forward directly to the sea-side; as if there had lain a fleet of transport ships ready for them to embark in. Let the children of Israel go as far as they can upon dry ground, and then God will divide the sea. The same power could have congealed the waters for them to pass over, but infinite Wisdom chose rather to divide the waters for them to pass through, for that way of salvation is always pitched upon which is most humbling.

14:15-20 Moses' silent prayers of faith prevailed more with God than Israel's loud outcries of fear. The pillar of cloud and fire came behind them, where they needed a guard, and it was a wall between them and their enemies. The word and providence of God have a black and dark side toward sin and sinners, but a bright and pleasant side toward the people of the Lord. He, who divided between light and darkness, Ge 1:4, allotted darkness to the Egyptians, and light to the Israelites. Such a difference there will be between the inheritance of the saints in light, and that utter darkness which will be the portion of hypocrites for ever.Wherefore criest thou unto me? - Moses does not speak of his intercession, and we only know of it from this answer to his prayer. 15-18. the Lord said unto Moses, Wherefore criest thou unto me? &c.—When in answer to his prayers, he received the divine command to go forward, he no longer doubted by what kind of miracle the salvation of his mighty charge was to be effected. Wherefore criest thou unto me, by fervent, though secret prayer? for which he doth not reprove him, but only bids him turn his prayer into action. Compare Joshua 7:10,13.

And the Lord said unto Moses, wherefore criest thou unto me?.... The Targum of Jonathan is,"why standest thou and prayest before me?''and no doubt this crying is to be understood of prayer, of mental prayer, of secret ejaculations put up by Moses to the Lord without a voice, for no mention is made of any: this shows, that though Moses most firmly believed that God would work salvation for them, yet he did not neglect the use of means, prayer to God for it; nor was the Lord displeased with him on that account, only he had other work for him to do, and he had no need to pray any longer, God had heard him, and would save him and his people:

speak unto the children of Israel, that they go forward; a little further, as Aben Ezra observes, until they were come to the sea shore, near to which they now were; and thither they were to move in an orderly composed manner, as unconcerned and fearless of their enemies.

And the LORD said unto Moses, Wherefore {i} criest thou unto me? speak unto the children of Israel, that they go forward:

(i) Thus in temptation faith fights against the flesh, and cries with inward groanings to the Lord.