Deuteronomy 17:6
At the mouth of two witnesses, or three witnesses, shall he that is to die be put to death: he shall not be put to death at the mouth of one witness.
Numbers 35:30
Whoever shall smite a person mortally, at the mouth of witnesses shall the murderer be put to death; but one witness shall not testify against a person to cause him to die.
Deuteronomy 19:15
One witness shall not rise up against a man for any iniquity, and for any sin, in any sin that he sinneth: at the mouth of two witnesses, or at the mouth of three witnesses, shall a matter be established.
Matthew 18:16
But if he do not hear thee, take with thee one or two besides, that every matter may stand upon the word of two witnesses or of three.
2 Corinthians 13:1
This third time I am coming to you. In the mouth of two or three witnesses shall every matter be established.
1 Timothy 5:19
Against an elder receive not an accusation unless where there are two or three witnesses.
Hebrews 10:28
Any one that has disregarded Moses' law dies without mercy on the testimony of two or three witnesses:
John 8:17-18
And in your law too it is written that the testimony of two men is true: