Theophylact of Ohrid — as excerpted in the Catena Aurea on Mark 14:66-72

“For tears brought Peter by penitence to Christ. Confounded then be the Novatians, who say that he who sins after receiving baptism, is not received to the remission of his sin. For behold Peter, who had also received the Body and Blood of the Lord, is received by penitence; for the failings of saints are written, that if we fall by want of caution, we also may be able to run back through their example, and hope to be relieved by penitence.”