Basil of Caesarea : You have given a sign, the blood itself of a lamb without blemish, slain for the sin of the world. And Ezekiel says that a sign was given on the foreheads of the persons. — HOMILIES ON THE Psalms 20:3 (Psalms 59) Maximus of Turin : In Ezekiel the prophet, when the angel who had been sent had slain everyone and the slaughter had begun at the holy places, only those whom he had signed with the letter tau—that is, with the mark of the cross—remained unharmed. — SERMON 45:2