“Who of the saints would not shudder to be merry with such persons…They do not know, the wretches, that what they offer their friends and sons as food is deadly poison, just as Eve did not understand that it was death she gave to her husband. So are all that do evil…Therefore I shall raise my voice in sadness and grief – O you fair and beloved brethren and sons whom I have begotten in Christ, countless of number, what can I do you for…The wickedness of the wicked hath prevailed over us.”

Reference:
http://prayerfoundation.org/st_patricks_letter_to_coroticus.htm