Deuteronomy 17:6
On the testimony of two or three witnesses a man shall be put to death, but he shall not be executed on the testimony of a lone witness.
Berean Standard Bible
At the mouth of two witnesses, or three witnesses, shall he that is worthy of death be put to death; but at the mouth of one witness he shall not be put to death.
At the mouth of two witnesses, or three witnesses, he who is to die shall be put to death. At the mouth of one witness he shall not be put to death.