He taught in these verses...
We should love our enemies, and God himself is kind to the good and evil so we should be merciful like him:
"Luke 6:35-36King James Version (KJV)
35 But love ye your enemies, and do good, and lend, hoping for nothing again; and your reward shall be great, and ye shall be the children of the
Highest: for he is kind unto the unthankful and to the evil.
36 Be ye therefore merciful, as your Father also is merciful.
Do not use weapons, those who use them will perish with them:
Matthew 26:52King James Version (KJV)
52 Then said Jesus unto him, Put up again thy sword into his place: for all they that...