'Sword' in the Bible

"Don't think that I came to send peace on the earth. I didn't come to send peace, but a sword.

Behold, one of those who were with Jesus stretched out his hand, and drew his sword, and struck the servant of the high priest, and struck off his ear.

Then Jesus said to him, "Put your sword back into its place, for all those who take the sword will die by the sword.