Tiberianus, the Baetican, in answer to an insinuation that he shared the heresy of Priscillian, wrote an apology in pompous and mongrel language. But after the death of his friends, overcome by the tediousness of exile, he changed his mind, as it is written in Holy Scripture “the dog returned to his vomit,” and married a nun, a virgin dedicated to Christ.
Source: De Viris Illustribus (Illustrious Men) (New Advent)