Deuteronomy 19:15-19

LEB(i) 15 The testimony of a single witness may not be used to convict* with respect to any crime and for any wrongdoing in any offense that a person* committed; on the evidence* of two witnesses or on the evidence* of three witnesses a charge shall be sustained.* 16 If a malicious witness* gets up to accuse* anyone to testify against him falsely, 17 then the two men to whom the legal dispute pertains* shall stand before* Yahweh, before* the priests and the judges who are in office in those days. 18 Then judges shall make a thorough inquiry, and if it turns out* that the witness is a false witness and he testified falsely against his brother, 19 then you shall do to him as he meant* to do to his brother, and so you shall purge the evil from your midst.