The Synod of Laodicea (c. 363 AD)

The Oblation must not be made by bishops or presbyters in any private houses.

Ancient Epitome of Canon LVIII.

Neither a bishop nor a presbyter shall make the offering in private houses.

By “the oblation” here is intended the oblation of the unbloody sacrifice according to the mind of the Greek interpreters. Zonaras says: “The faithful can pray to God and be intent upon their prayers everywhere, whether in the house, in the field, or in any place they possess: but to offer or perform the oblation must by no means be done except in a church and at an altar.”