Charles Ellicott Commentary Psalms 106:2

"Who can utter the mighty acts of Jehovah, Or show forth all his praise?" — Psalms 106:2 (ASV)

Praise. — Tehillah, a term that has become technical for a liturgic hymn. (Tehillîm is the general Hebrew word for the psalter. See General Introduction.) The psalmist asks in this verse who is worthy or privileged to sing a tehillah, and he himself answers that loyalty to the covenant confers this privilege.