Matthew 18:16
but if he regard thee not, take with thee one or two more, that in the mouth of two or three witnesses every word may be established.
2 Corinthians 13:1
This, I say, is the third time I am coming to you: and at the mouth of two or three witnesses shall every word be established.
1 Timothy 5:19
Receive not an accusation against an elder, unless from two or three witnesses.
Hebrews 10:28
If any one that violateth the law of Moses, dieth without mercy under two or three witnesses,
John 8:17-18
And it is written in your own law, that the testimony of two persons is valid.