[94] [cap.21] It is not unnaturally, therefore, that Moses, singing his song of triumph on the destruction of the riders, nevertheless prays for complete safety for the horsemen; for these are able, putting their bridles into the mouths of the irrational powers, to check the impetuosity of their superabundant violence. What then his prayer is must be told: he says, "Let Dan be a serpent in the way, sitting in the path, biting the heel of the horse; and the horseman shall fall backwards, awaiting the salvation of the Lord." [27]