Nicene and Post-Nicene Fathers, Ser. II, Vol. XIV:
The Canons of the Councils of Ancyra, Gangra, Neocæsarea, Antioch and Laodicea, which Canons were Accepted and Received by the Ecumenical Synods.: Canon XXXII

Canon XXXII.

It is unlawful to receive the eulogiæ of heretics, for they are rather ἀλογίαι [i.e., follies], than eulogiæ [i.e., blessings].

Notes.

Ancient Epitome of Canon XXXII.

The blessings of heretics are cursings.

To keep the Latin play upon the words the translator has used bene-dictiones and male-dictiones, but at the expense of the accuracy of translation.

This canon is found in the Corpus Juris Canonici, Gratian’s Decretum, Pars II., Causa II., Quæst. I., Can. lxvj.