Exodus 15:2 - Strength, Song, and Salvation in Jesus!

The LORD is my strength and my song;
he has become my salvation.
He is my God, and I will praise him
Exo 15:2 (NIV)

In the previous chapter we have just read how that complete victory of
Israel over the Egyptians was obtained, here we are told how it was
celebrated; those that were to hold their peace while the deliverance was in
working must not hold their peace now that it was wrought; ... They expressed
their joy in God, and thankfulness to him, by singing... [Matthew Henry
Commentary mod]

These key elements in the psalm sung by Israel in 15:1-21 form the core of
God's future redemptive revelation: (1) the Lord who is strong has become
Israel's salvation (15:2); (2) the Lord is a warrior (15:3); (3) he is
incomparable: (15:11); (4) he would plant Israel in his inheritance (15:17);
and (5) the Lord is an eternal king (15:18). [New Bible Companion mod]

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, [Matthew Henry
Commentary]

The focus of the song is God himself [NIV SB]

The divine name Yahweh ("the LORD") appears ten times. [NIV SB]

The abbreviated form of God's name, Yah, appears here (vs.2) for the first
time in the OT narrative. It is occasionally used in poetic language on
account of the rhythm, [SDA Commentary]

Every man may call the Divine Being his GOD; but only those who are his
children by adoption through grace can call him their FATHER. This is a
privilege which God has given to none but his children. (Adam Clarke
Commentary)

Moses is expressing the deepest feeling of the true believer as he reflects
upon the greatness of the Lord's salvation. [Believer's SB]

This is the first recorded song in the Bible, significantly coming after
redemption from bondage. Only the Christian has a right to sing songs of
redemption (Ps. 40:1-3). Exodus began with sighing (2:23), but because of
redemption, we now see the nation singing. Note that this song exalts God,
for the Lord is referred to at least forty-five times in these eighteen
verses. Too many songs exalt men instead of the Person and holy character of
God, and His wonderful works of power.
Note the key refrain in v. 2. It is repeated in Ps. 118:14, at the time the
Jews returned from captivity and rebuilt the temple under Ezra, as well as
in Isa. 12:2, referring to that day in the future when God will restore the
nation to their land. See Isa. 11:15-16. Israel sang this song when
delivered from Egypt, led by Moses the prophet and when delivered from
Babylon, led by Ezra, a priest. They will yet sing it when delivered from
the Gentile nations, when they turn to Christ, their king. [Wiersbe
Expository Outlines]

Praise extols God's character and His works. It looks to past, present, and
future. [Believer's SB]

Psalms and hymns can be great ways to express relief, praise, and thanks
when you have been through trouble. [Life Application SB]

"If anyone would tell you the shortest, surest way to all happiness and all
perfection, he must tell you to make a rule to yourself to thank and praise
God for everything that happens to you. It is certain that whatever seeming
calamity happens to you, if you thank and praise God for it, you turn it
into a blessing. If you could work miracles, therefore, you could not do
more for yourself than by this thankful spirit. It heals and turns all that
it touches into happiness." William Law  [The 365-Day Devotional Commentary]

You and I can decide to fill our homes and our thoughts with tunes that
celebrate what God has done, who He is, and what He will surely do for us.
This is one of the most important things we can do for our children as well
as for our own spiritual growth and peace of mind. [The 365-Day Devotional
Commentary]

REGARDING VERSE 2:

How judiciously are the members of this sentence arranged! He who has God
for his strength, will have him for his song; and he to whom Yahwey has
become salvation, will exalt his name. (Adam Clarke Commentary)

STRENGTH:
They have work to do, temptations to grapple with, and afflictions to bear,
and are weak in themselves; but he strengthens them: his grace is their
strength.
SONG;
They are often in sorrow, upon many accounts, but in him they have comfort,
he is their song;
SALVATION:
Sin, and death, and hell, threaten them, but he is, and will be, their
salvation: [Matthew Henry Commentary]