The LORD is a warrior; the LORD is his name.
And he sent you on a mission, saying, 'Go and completely destroy those wicked people, the Amalekites; make war on them until you have wiped them out.'
Do not suppose that I have come to bring peace to the earth. I did not come to bring peace, but a sword.
He said to them, "But now if you have a purse, take it, and also a bag; and if you don't have a sword, sell your cloak and buy one."
But I tell you, Do not resist an evil person. If someone strikes you on the right cheek, turn to him the other also.
"Put your sword back in its place," Jesus said to him, "for all who draw the sword will die by the sword."
Peace I leave with you; my peace I give you.
Romans 15:33 (also 1 Corinthians 14:33)
Now the God of peace be with you all. Amen.
The passages from Matthew and Luke are addressed in Was Jesus a pacifist? Finally, "peace" in the NT passages is generally interpreted as referring to peace between oneself and God.
Other responses (offsite)