Deuteronomy 17:6
On the word of two or three witnesses, a man may be given the punishment of death; but he is not to be put to death on the word of one witness.
Numbers 35:30
Anyone causing the death of another is himself to be put to death on the word of witnesses: but the word of one witness is not enough.
Deuteronomy 19:15
One witness may not make a statement against a man in relation to any sin or wrongdoing which he has done: on the word of two or three witnesses a question is to be judged.
Matthew 18:16
But if he will not give ear to you, take with you one or two more, that by the lips of two or three witnesses every word may be made certain.
2 Corinthians 13:1
This is the third time that I am coming to you. From the mouth of two or three witnesses will every word be made certain.
1 Timothy 5:19
Do not take as true any statement made against one in authority, but only if two or three give witness to it.
Hebrews 10:28
A man who has gone against the law of Moses is put to death without pity on the word of two or three witnesses:
John 8:17-18
Even in your law it is said that the witness of two men is true.