Matthew 5:39

ἐγὼ δὲ λέγω ὑμῖν μὴ ἀντιστῆναι τῷ πονηρῷ· ἀλλ’ ὅστις σε ῥαπίσει ἐπί τὴν δεξιὰν σου σιαγόνα στρέψον αὐτῷ καὶ τὴν ἄλλην·

But I say to you, Do not resist an evil person, but whoever slaps you on your right cheek, turn to him the other also.