The Council of Chalcedon
Concerning bishops or clergymen who go about from city to city, it is decreed that the canons enacted by the Holy Fathers shall still retain their force.
Source details
A.D. 451 · Canon 5 (451)
Checked word-for-word against Nicene and Post-Nicene Fathers, Series 2, Vol. 14 · 2026-07-26