Romans 13:4 For he is the minister of God to thee for good. But if thou do that which is evil, be afraid; for he bearethnot the sword in vain: for he is the minister of God, a revenger to execute wrath upon him that doeth evil.
English “sword” emboldened in Romans 13:4 was translated from Greek feminine noun 3162 machaira which was also translated into “sword” in Matthew 10:34 Ephesians 6:17 and Hebrews 4:12 “Think not that I am come to send peace on earth: I came not to send peace, but a sword” “And take the helmet of salvation, and the sword of the Spirit, which is the word of God” “For the word of God is quick, and powerful, and sharper than any twoedged sword, piercing even to the dividing asunder of soul and spirit, and of the joints and marrow, and is a discerner of the thoughts and intents of the heart”.
What Does The Bible Really Say? 