Bede the Venerable
Catena Aurea · Johannesevangelium 18
And Simon Peter stood and warmed himself. They said therefore unto him, Art not thou also one of his disciples? He denied it, and said, I am not. One of the servants of the high priest, being his kinsman whose ear Peter cut off, saith, Did not I see thee in the garden with him? Peter then denied again: and immediately the cock crew.
Mystically, by the first denial of Peter are denoted those who before our Lord’s Passion denied that He was God, by the second, those who did so after His resurrection. So by the first crowing of the cock His resurrection is signified; by the second, the general resurrection at the end of the world. By the first damsel, who obliged Peter to deny, is denoted lust, by the second, carnal delight: by one or more servants, the devils who persuade men to deny Christ.