10 “Then believed they in His words”. The expression seems barely Latin, for he says not “believed His word,” or “on His words,” but “in His words;” yet it is very frequent in Scripture. “And praised praise unto Him;” such an expression as when we say, “This servitude he served,” “such a life he lived.” He is here alluding to that well-known hymn, commencing, “I will sing unto the Lord, for He has triumphed gloriously: the horse and the rider has He thrown into the sea.”
Source: The Enarrations, or Expositions, on the Psalms (New Advent)