1 John 1:10

10Ifἐὰνwe should sayεἴπωμενthatὅτιnotοὐχwe have sinnedἡμαρτήκαμεν,a liarψεύστηνwe makeποιοῦμενHimαὐτὸνandκαὶtheὁwordλόγοςof Himαὐτοῦnotοὐκisἔστινinἐνusἡμῖν.

If we should say that we have not sinned, we make Him a liar and His word is not in us.