'Sword' in the Bible

Who shall separate us from the love of Christ? shall tribulation, or distress, or persecution, or famine, or nakedness, or peril, or sword?

For he is the minister of God to thee for good. But if thou do that which is evil, be afraid; for he beareth not the sword in vain: for he is the minister of God, a revenger to execute wrath upon him that doeth evil.

But if you do what is wrong, you should be afraid, for it is not without reason that they bear the sword. Indeed, they are God's servants to administer punishment to anyone who does wrong. Therefore, it is necessary for you to be acquiescent to the authorities, not only for the sake of God's punishment, but also for the sake of your own conscience.