Luke 6:29-31 New King James Version (NKJV)
29 To him who strikes you on the one cheek, offer the other also. And from him who takes away your cloak, do not withhold your tunic either. 30 Give to everyone who asks of you. And from him who takes away your goods do not ask them back. 31 And just as you want men to do to you, you also do to them likewise.