Library Ignatius of Antioch Epistles (Middle Recension)
Philadelphians, Chapter 2: Maintain union with the bishop
Wherefore, as children of light and truth, flee from division and wicked doctrines; but where the shepherd is, there follow as sheep. For there are many wolves that appear worthy of credit, who, by means of a pernicious pleasure, carry captive 2 Timothy 3:6 those that are running towards God; but in your unity they shall have no place.
English translation in Ante-Nicene Fathers, Vol. I (eds. Alexander Roberts and James Donaldson; Buffalo: Christian Literature Publishing Co., 1885). Public domain. Digital text via New Advent Church Fathers. ANF prints the shorter Greek (middle) recension.