Charles H. Spurgeon on Psalms 130:7

Plenteous redemption, or more literally, "redemption plenteously." He calls it plenteous, as Luther says, because such is the straitness of our heart, the slenderness of our hopes, the weakness of our faith, that it far exceeds all our capacity, all our petitions and all our desires. —J. J. Stewart Perowne.

Verses 7-8. This Psalm containeth an evident prophecy of the Messias; in setting forth his plentiful redemption, and that he should redeem Israel, that is, the Church, from all their sins. Which words in their full sense were used by an angel to Joseph, in telling him that the child's name should be JESUS, "because he should save his people from their sins": Mt 1:21. —Sir John Hayward (1560-1627), in "David's Tears," 1623.