Catena Aurea on Mark 14:60–65: Leo the Great

But Caiaphas, to increase the odiousness of what they had heard, “rent his clothes,” and without knowing what his frantic action meant, by this madness, deprived himself of the honour of the priesthood, forgetting that command, by which it is said of the High Priest, “He shall not uncover his head or rend his clothes.” [Lev 21:10]

For there follows: “The High Priest rent his clothes, and saith, What need we any further witnesses? Ye have heard the blasphemy: what think ye?”