On the evidence of two witnesses or of three witnesses the one who is to die shall be put to death; a person shall not be put to death on the evidence of one witness.

Laws Concerning Witnesses

“A single witness shall not suffice against a person for any crime or for any wrong in connection with any offense that he has committed. Only on the evidence of two witnesses or of three witnesses shall a charge be established.

But if he does not listen, take one or two others along with you, that every charge may be established by the evidence of two or three witnesses.

Final Warnings

This is the third time I am coming to you. Every charge must be established by the evidence of two or three witnesses.

Do not admit a charge against an elder except on the evidence of two or three witnesses.

Anyone who has set aside the law of Moses dies without mercy on the evidence of two or three witnesses.