David
Psalm 103:2ESV·traditional attribution

Bless the LORD, O my soul, and forget not all his benefits,

John Calvin Reformed @genevareformer

PSALM 103 By this psalm every godly man is taught to give thanks to God for the mercies bestowed upon himself in particular, and then for the grace which God has vouchsafed to all his chosen ones in common, by making a covenant of salvation with them in his law, that he might make them partakers of his adoption.

Commenting on Psalm 103:1-22

C.H. Spurgeon Reformed Baptist @princeofpreachers

Bless the Lord, O my soul. He is in real earnest, and again calls upon himself to arise. Had he been very sleepy before? Or was he now doubly sensible of the importance, the imperative necessity of adoration? Certainly, he uses no vain repetitions, for the Holy Spirit guides his pen; and thus he shews us that we have need, again and again, to bestir...

Matthew Henry Presbyterian @wholebiblehenry

David is here communing with his own heart, and he is no fool that thus talks to himself and excites his own soul to that which is good. Observe, I. How he stirs up himself to the duty of praise, Psa 103:1, Psa 103:2. 1.

Commenting on Psalm 103:1-5