Gregory the Great, on Ps 67:23

“The Lord said: I will turn them from Basan, I will turn them into the depth of the sea:”

“But on the other hand, dogs licked the wounds of the poor man lying there. Sometimes in sacred speech preachers are understood by dogs. For the tongue of a dog, when it licks a wound, heals it, because holy teachers too, when they instruct us in the confession of our sin, touch as it were the wound of the mind through their tongue; and because by speaking they rescue us from sins, by touching wounds as it were they restore us to health. For that by the name of dogs the tongue of preachers is signified, the Lord says through the Psalmist: "The tongue of your dogs from enemies, from him." For from the unbelieving Jews the holy preachers were chosen, who, coming against thieves and robbers in defense of the truth, gave great barkings, so to speak, for the Lord.”

Imported from an open dataset — not yet checked against the printed edition.