Catena Aurea on John 14:22–27: Augustine of Hippo

And perhaps there is a distinction at bottom, since He speaks of His sayings, when they are His own, in the plural number; as when He says, He that loveth Me not, keepeth not My sayings: when they are not His own, but the Father’s, in the singular, i. e. as the Word, which is Himself. For He is not His own Word, but the Father’s, as He is not His own image, but the Father’s, or His own Son, but the Father’s.