C. F. Keil and Franz Delitzsch on Psalms 77:20

Psa 77:20

If we have divided the strophes correctly, then this is the refrain-like close. Like a flock God led His people by Moses and Aaron (Num 33:1) to the promised goal. At this favourite figure, which is as it were the monogram of the Psalms of Asaph and of his school, the poet stops, losing himself in the old history of redemption, which affords him comfort in abundance, and is to him a prophecy of the future lying behind the afflictive years of the present.