Charles Ellicott Commentary Psalms 147:7

"Sing unto Jehovah with thanksgiving; Sing praises upon the harp unto our God," — Psalms 147:7 (ASV)

Sing. —Literally, answer, which some think suggests an antiphonal arrangement. Though the strophic arrangement is only loosely marked, the psalm takes a new departure here, with a fresh invocation to praise, going on to fresh proofs from nature of the Almighty Power.