Matthew 18:16
but, if he hear you not, take with you yet one or two, that at the mouth of two witnesses or three, every word may be established.
2 Corinthians 13:1
This is the third time I am coming to you. At the mouth of two witnesses, and of three, shall every word be established.
1 Timothy 5:19
Against an elder receive not an accusation, except on the testimony of two or three witnesses.
Hebrews 10:28
Anyone, having set aside Moses' law, dies without mercy on the testimony of two or three witnesses;
John 8:17-18
And in your law also it has been written, 'The testimony of two men is true.'