And the high priest rent his clothes ( διαῤῥήξας τοὺς χιτῶνας); literally, his tunics.; St. Matthew (Matthew 26:65) has τὰ ἱμὰτια literally, his garments. None but people of rank wore two tunics.
The Greek verb here rendered "rent" implies violent dramatic action. The Jewish tunic was open under the chin, and large enough to receive the head, so that it could easily be placed over the shoulders, by inserting the head.
When the wearer wished to give this sign of indignation or grief, he would seize the garment at this opening with both hands, and violently tear it asunder down to the waist. But it was unlawful for the high priest to do this in a private grief (Le Matthew 10:6).
Some of the Fathers think that by this action Caiaphas involuntarily typified the rending of the priesthood from himself and from the Jewish nation.