1 Timothy 5:19

Against an elder receive not an accusation
A charge of any crime:

but before two or three witnesses;
good sufficient ones, who are capable of well attesting the fact: a charge against a pastor of a church is not to be easily received; it should not be listened to privately, unless it clearly appears by such a number of witnesses; nor should it be brought publicly before the church, until it is privately and previously proved, by a sufficient number of credible witnesses, that it is really fact. The sense is, not that judgment shall not pass against him but by such a number of witnesses, or that the evidence upon his trial shall consist of such a number; for this is no other than what ought to be in the case of a private member, and of every man, according to ( Deuteronomy 19:15 ) . But the sense is, that the affair of an elder shall not be put upon a trial, much less sentence pass, until it has been privately proved against him, by proper testimonies, beyond all exception; only in such a case, should a church admit a charge against its elder. The reason of this rule is, because of his high office and the honour of the church, which is concerned in his, as well as of religion; for it carries in it some degree of scandal for such a person to be charged, even though he may be cleared; as also because of his many enemies, who through envy, malice, and the instigation of Satan, would be continually pestering the church with charges, could they be easily admitted.