Mat Matthew, chapter The Gospel According to Matthew, chapter 18
“If he does not listen to you, reprove him before another; if by every oath he does not listen to you, add still one or two in order that your words might be before two or three witnesses, because by two or three witnesses a word will be established”.Deu 17:6; Deu 19:15; Jhn 8:17; 2Co 13:1; Heb 10:28