Matthew 18:16

But if he will not listen, take one or two others along, so that ‘every matter may be established by the testimony of two or three witnesses.’

Note Deuteronomy 19:15

But if he will not hear thee, then take with thee one or two more, that in the mouth of two or three witnesses every word may be established.

But if he doesn’t listen, take one or two more with you, that at the mouth of two or three witnesses every word may be established.

But if he hear thee not, take with thee one or two more, that at the mouth of two witnesses or three every word may be established.