Thy right hand - Thy omnipotence, manifested in a most extraordinary way.

Thy right hand, O Lord, is become glorious in power,.... In bringing the children of Israel out of Egypt, and through the Red sea, and in the destruction of Pharaoh and the Egyptians; and so the right hand of Christ, expressive of his power, he has in and of himself, and is the same with his Father's, and is mighty, yea, almighty, is become glorious, famous, and illustrious, in the redemption and salvation of his people, by bearing their sins, and working out a righteousness for them; and in the destruction of their enemies, sin, Satan, the world, and death, as is more fully expressed in the next clause:

thy right hand, O Lord, hath dashed in pieces the enemy; in a literal sense, Pharaoh and his host, the avowed enemies of Israel; and, in a spiritual sense, those before named, together with all the antichristian party, those enemies of Christ, and his people, whom he wilt break to shivers as a potter's vessel, Revelation 2:27.

Jehovah had not only proved Himself to be a true man of war in destroying the Egyptians, but also as the glorious and strong one, who overthrows His enemies at the very moment when they think they are able to destroy His people.

Exodus 15:6-7

"Thy right hand, Jehovah, glorified in power (gloriously equipped with power: on the Yod in נאדּרי, see Genesis 31:39; the form is masc., and ימין, which is of common gender, is first of all construed as a masculine, as in Proverbs 27:16, and then as a feminine), "Thy right hand dashes in pieces the enemy." רעץ equals רצץ: only used here, and in Judges 10:8. The thought it quite a general one: the right hand of Jehovah smites every foe. This thought is deduced from the proof just seen of the power of God, and is still further expanded in Exodus 15:7, "In the fulness of Thy majesty Thou pullest down Thine opponents." הרס generally applied to the pulling down of buildings; then used figuratively for the destruction of foes, who seek to destroy the building (the work) of God; in this sense here and Psalm 28:5. קמים: those that rise up in hostility against a man (Deuteronomy 33:11; Psalm 18:40, etc.). "Thou lettest out Thy burning heat, it devours them like stubble." חרן, the burning breath of the wrath of God, which Jehovah causes to stream out like fire (Ezekiel 7:3), was probably a play upon the fiery look cast upon the Egyptians from the pillar of cloud (cf. Isaiah 9:18; Isaiah 10:17; and on the last words, Isaiah 5:24; Nahum 1:10).

Thy right hand, O LORD, is become glorious in power: thy right hand, O LORD, hath dashed in pieces the enemy.

15:1-21 This song is the most ancient we know of. It is a holy song, to the honour of God, to exalt his name, and celebrate his praise, and his only, not in the least to magnify any man. Holiness to the Lord is in every part of it. It may be considered as typical, and prophetical of the final destruction of the enemies of the church. Happy the people whose God is the Lord. They have work to do, temptations to grapple with, and afflictions to bear, and are weak in themselves; but his grace is their strength. They are often in sorrow, but in him they have comfort; he is their song. Sin, and death, and hell threaten them, but he is, and will be their salvation. The Lord is a God of almighty power, and woe to those that strive with their Maker! He is a God of matchless perfection; he is glorious in holiness; his holiness is his glory. His holiness appears in the hatred of sin, and his wrath against obstinate sinners. It appears in the deliverance of Israel, and his faithfulness to his own promise. He is fearful in praises; that which is matter of praise to the servants of God, is very dreadful to his enemies. He is doing wonders, things out of the common course of nature; wondrous to those in whose favour they are wrought, who are so unworthy, that they had no reason to expect them. There were wonders of power and wonders of grace; in both, God was to be humbly adored.