1 Timothy 5:19

19 Do not entertain an accusation against an elder unless it is brought by two or three witnesses.

Read 1 Timothy 5:19 Using Other Translations

Against an elder receive not an accusation, but before two or three witnesses.
Do not admit a charge against an elder except on the evidence of two or three witnesses.
Do not listen to an accusation against an elder unless it is confirmed by two or three witnesses.