David
Psalm 103:1WEB·superscription

Praise Yahweh, my soul! All that is within me, praise his holy name!

C.H. Spurgeon Reformed Baptist

Bless the Lord O my soul. Soul music is the very soul of music. The Psalmist strikes the best keymote when he begins with stirring up his inmost self to magnify the Lord. He soliloquizes, holds self-communion and exhorts himself, as though he felt that dulness would all too soon steal over his faculties, as, indeed, it will over us all, unless we are diligently on the watch.

John Gill Reformed Baptist

Bless the Lord, O my soul,.... His better part, his soul, which comes immediately from God, and returns to him, which is immaterial and immortal, and of more worth than the world: God is to be served with the best we have; as with the best of our substance, so with the best of our persons; and it is the heart, or soul, which he...

Keil & Delitzsch Lutheran

To the “Thou wilt have compassion upon Zion” of Psa 102:14 is appended Psalms 103, which has this as its substance throughout; but in other respects the two Psalms stand in contrast to one another. The inscription לדוד is also found thus by itself without any further addition even before Psalms of the First Book (Psa 26:1, Ps 35, Ps 37).