David
Psalm 103:13ESV·traditional attribution

As a father shows compassion to his children, so the LORD shows compassion to those who fear him.

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

Like as a father pitieth his children, so the Lord pitieth them that fear him. To those who truly reverence his holy name, the Lord is a father and acts as such. These he pities, for in the very best of men the Lord sees much to pity, and when they are at their best state they still need his compassion.

Matthew Henry Presbyterian @wholebiblehenry

Hitherto the psalmist had only looked back upon his own experiences and thence fetched matter for praise; here he looks abroad and takes notice of his favour to others also; for in them we should rejoice and give thanks for them, all the saints being fed at a common table and sharing in the same blessings. I.

Commenting on Psalm 103:6-18