O give thanks unto the God of gods: for his mercy [endureth] for ever.
Ver. 2. For his mercy endureth for ever] This is the foot or burden of the whole song; neither is it any idle repetition, but a notable expression of the saints' unsatisfiableness in praising God for his never failing mercy. These heavenly birds, having got a note, record it over and over. In the last psalm there are but six verses, yet twelve Hallelujahs.