Historia Arianorum

Upon hearing this, the Emperor no longer delayed, but knowing the man, and the dignity of his years, wrote to summon him. This was when he first began his attempt upon Liberius. Upon his arrival he desired him, and urged him with the usual arguments, with which he thought also to deceive the others, that he would subscribe against us, and hold communion with the Arians. But the old man, scarcely bearing to hear the words, and grieved that he had even ventured to utter such a proposal, severely rebuked him, and after gaining his consent, withdrew to his own country and Church.

But the heretics still complaining, and instigating him to proceed (he had the eunuchs also to remind him and to urge him further), the Emperor again wrote in threatening terms; but still Hosius, while he endured their insults, was unmoved by any fear of their designs against him, and remaining firm to his purpose, as one who had built the house of his faith upon the rock, he spoke boldly against the heresy, regarding the threats held out to him in the letters but as drops of rain and blasts of wind.

And although Constantius wrote frequently, sometimes flattering him with the title of Father, and sometimes threatening and recounting the names of those who had been banished, and saying, 'Will you continue the only person to oppose the heresy? Be persuaded and subscribe against Athanasius; for whoever subscribes against him thereby embraces with us the Arian cause;' still Hosius remained fearless, and while suffering these insults, wrote an answer in such terms as these. We have read the letter, which is placed at the end.