Nicene and Post-Nicene Fathers, Ser. II, Vol. XIV:
The Canons of the Synods of Sardica, Carthage, Constantinople, and Carthage Under St. Cyprian, Which Canons Were Received by the Council in Trullo and Ratified by II. Nice.: Canon XLII

Canon XLII.  (Greek xiv.)

Concerning the not having feasts under any circumstances in churches.

That no bishops or clerics are to hold feasts in churches, unless perchance they are forced thereto by the necessity of hospitality as they pass by.  The people, too, as far as possible, are to be prohibited from attending such feasts.

Notes.

Ancient Epitome of Canon XLII.

A cleric is not to feast in a church, unless perchance he is driven thereto by the necessity of hospitality.  This also is forbidden to the laity.

This canon is Canon xxix. of the Synod of Hippo, a.d. 393.