Matthew 18:16

16Ifἐὰνhoweverδὲnotμὴhe will hearἀκούσῃ,takeπαράλαβεwithμετὰyouσοῦmoreἔτιoneἕναorἢtwoδύο,thatἵναuponἐπὶ[the] testimonyστόματοςof twoδύοwitnessesμαρτύρωνorἢof threeτριῶνmay be strengthenedσταθῇeveryπᾶνwordῥῆμα·

But if he may not hear, take with you one or two more, so that ‘every word may be stood upon the testimony of two or three witnesses.’