David
Psalm 138:8ESV·traditional attribution

The LORD will fulfill his purpose for me; your steadfast love, O LORD, endures forever. Do not forsake the work of your hands.

John Calvin Reformed @genevareformer

PSALM 138 In this Psalm David, in remembrance of the singular help which had always been vouchsafed him by God — the experience he had enjoyed of his faithfulness and goodness, takes occasion to stir himself up to gratitude; and from what he had known of the divine faithfulness, he anticipates a continuance of the same mercy. If dangers must be met, he confidently looks for a happy issue.

Commenting on Psalm 138:1-8

C.H. Spurgeon Reformed Baptist @princeofpreachers

The Lord will perfect that which concerneth me. All my interests are safe in Jehovah's hands. God is concerned in all that concerns his servants. He will see to it that none of their precious things shall fail of completion; their life, their strength, their hopes, their graces, their pilgrimage, shall each and all be perfected. Jehovah himself will see to this and therefore it is most sure.

Matthew Henry Presbyterian @wholebiblehenry

David here comforts himself with three things: - I. The favour God bears to his humble people (Psa 138:6): Though the Lord be high, and neither needs any of his creatures nor can be benefited by them, yet has he respect unto the lowly, smiles upon them as well pleased with them, overlooks heaven and earth to cast a gracious look upon them (Isa 57:15...

Commenting on Psalm 138:6-8