The morning watch - A watch was the fourth part of the time from sun-setting to sun-rising; so called from soldiers keeping guard by night, who being changed four times during the night, the periods came to be called watches. - Dodd.

As here and in 1 Samuel 11:11 is mentioned the morning watch; so in Lamentations 2:19, the beginning of the watches; and in Judges 7:19, the middle watch is spoken of; in Luke 12:38, the second and third watch; and in Matthew 14:25, the fourth watch of the night; which in Mark 13:35 are named evening, midnight, cock-crowing, and day-dawning - Ainsworth.

As the Israelites went out of Egypt at the vernal equinox, the morning watch, or, according to the Hebrew, באשמרת הבקר beashmoreth habboker, the watch of day-break, would answer to our four o'clock in the morning - Calmet.

The Lord looked unto - This probably means that the cloud suddenly assumed a fiery appearance where it had been dark before; or they were appalled by violent thunders and lightning, which we are assured by the psalmist did actually take place, together with great inundations of rain, etc.: The clouds Poured Out Water; the skies sent out a Sound: thine Arrows also went abroad. The Voice of thy Thunder was in the heaven; the Lightnings Lightened the world; the earth Trembled and Shook. Thy way is in the sea, and thy path in the great waters. Thou leddest thy people like a flock, by the hand of Moses and Aaron; Psalm 77:17-20. Such tempests as these would necessarily terrify the Egyptian horses, and produce general confusion. By their dashing hither and thither the wheels must be destroyed, and the chariots broken; and foot and horse must be mingled together in one universal ruin; see Exodus 14:25. During the time that this state of horror and confusion was at its summit the Israelites had safely passed over; and then Moses, at the command of God, (Exodus 14:26), having stretched out his rod over the waters, the sea returned to its strength; (Exodus 14:27); i.e., the waters by their natural gravity resumed their level, and the whole Egyptian host were completely overwhelmed, Exodus 14:28. But as to the Israelites, the waters had been a wall unto them on the right hand and on the left, Exodus 14:29. This the waters could not have been, unless they had been supernaturally supported; as their own gravity would necessarily have occasioned them to have kept their level, or, if raised beyond it, to have regained it if left to their natural law, to which they are ever subject, unless in cases of miraculous interference. Thus the enemies of the Lord perished; and that people who decreed that the male children of the Hebrews should be drowned, were themselves destroyed in the pit which they had destined for others. God's ways are all equal; and he renders to every man according to his works.

and the sea

Exodus 14:21,22 And Moses stretched out his hand over the sea; and the LORD caused the sea to go back by a strong east wind all that night...

Exodus 15:1-21 Then sang Moses and the children of Israel this song to the LORD, and spoke, saying, I will sing to the LORD...

Joshua 4:18 And it came to pass, when the priests that bore the ark of the covenant of the LORD were come up out of the middle of Jordan...

Lord

Judges 5:20,21 They fought from heaven; the stars in their courses fought against Sisera...

overthrew.

Hebrews shook off

They who have not Been Promoted to that Office. ...
They who have not been promoted [to that office] by the bishop, ought not to adjure, either in churches or in private houses. Notes. Ancient Epitome of Canon XXVI. No one shall adjure without the bishop's promotion to that office. Balsamon. Some were in the habit of "adjuring," that is catechising the unbelievers, who had never received the imposition of the bishop's hands for that purpose; and when they were accused of doing so, contended that as they did not do it in church but only at home, they …
Philip Schaff—The Seven Ecumenical Councils

Of the Necessity of Divine Influences to Produce Regeneration in the Soul.
Titus iii. 5, 6. Titus iii. 5, 6. Not by works of righteousness, which we have done, but according to his mercy he saved us, by the washing of regeneration, and renewing of the Holy Ghost; which he shed on us abundantly, through Jesus Christ our Saviour. IF my business were to explain and illustrate this scripture at large, it would yield an ample field for accurate criticism and useful discourse, and more especially would lead us into a variety of practical remarks, on which it would be pleasant …
Philip Doddridge—Practical Discourses on Regeneration

Exodus
The book of Exodus--so named in the Greek version from the march of Israel out of Egypt--opens upon a scene of oppression very different from the prosperity and triumph in which Genesis had closed. Israel is being cruelly crushed by the new dynasty which has arisen in Egypt (i.) and the story of the book is the story of her redemption. Ultimately it is Israel's God that is her redeemer, but He operates largely by human means; and the first step is the preparation of a deliverer, Moses, whose parentage, …
John Edgar McFadyen—Introduction to the Old Testament