Ignatius of Antioch, Epistle to the Trallians 3.7
So guard yourselves against such people. You will be able to do this if you are not puffed up and if you remain inseparable from God Jesus Christ, from the bishop, and from the ordinances of the apostles.
The one who is inside the altar is clean, but the one who is outside the altar is not clean. That is, anyone who does anything apart from the bishop, the council of elders, and the deacons is not clean in conscience.
Greek
Φυλάττεσθε οὖν τοὺς τοιούτους. τοῦτο δὲ ἔσται ὑμῖν μὴ φυσιουμένοις καὶ οὖσιν ἀχωρίστοις θεοῦ Ἰησοῦ Χριστοῦ καὶ τοῦ ἐπισκόπου καὶ τῶν διαταγμάτων τῶν ἀποστόλων.
ὁ ἐντὸς θυσιαστηρίου ὢν καθαρός ἐστιν: ὁ δὲ ἐκτὸς θυσιαστηρίου ὤν οὐ καθαρός ἐστιν. τοῦτ̓ ἔστιν, ὁ χωρὶς ἐπισκόπου καὶ πρεσβυτερίου καὶ διακόνων πράσσων τι, οὗτος οὐ καθαρός ἐστιν τῇ συνειδήσει.