Deuteronomy 17:6

‘If anyone strikes down a person, the murderer shall be put to death at the mouth of witnesses, but no person shall be put to death on the testimony of one witness.

“If your brother, your mother’s son, or your son or daughter, or the wife you cherish, or your friend who is as your own soul, entices you secretly, saying, ‘Let us go and serve other gods’ (whom neither you nor your fathers have known,

“A single witness shall not rise up against a man on account of any iniquity or any sin which he has committed; at the mouth of two or three witnesses a matter shall be established.

That too would have been an iniquity calling for judgment, For I would have denied God above.

“Does our Law judge a man unless it first hears from him and knows what he is doing?”

“Even in your law it has been written that the witness of two men is true.

This is the third time I am coming to you. By the mouth of two or three witnesses every matter shall be confirmed.

Do not receive an accusation against an elder except on the basis of two or three witnesses.

Anyone who has set aside the Law of Moses dies without mercy by the mouth of two or three witnesses.