New American Standard Bible (NASB)
Romans 12
19 Never take your own revenge, beloved, but leave room for the wrath of God, for it is written, "Vengeance is Mine, I will repay," says the Lord.
20 "But if your enemy is hungry, feed him, and if he is thirsty, give him a drink; for in so doing you will heap burning coals on his head."
21 Do not be overcome by evil, but overcome evil with good.
Romans 13
1 Every person is to be in subjection to the governing authorities. For there is no authority except from God, and those which exist are established by God.
2 Therefore whoever resists authority has opposed the ordinance of God; and they who have opposed will receive condemnation upon themselves.
3 For rulers are not a cause of fear for good behavior, but for evil. Do you want to have no fear of authority? Do what is good and you will have praise from the same;
4 for it is a minister of God to you for good. But if you do what is evil, be afraid; for it does not bear the sword for nothing; for it is a minister of God, an avenger who brings wrath on the one who practices evil.
5 Therefore it is necessary to be in subjection, not only because of wrath, but also for conscience’ sake.
6 For because of this you also pay taxes, for rulers are servants of God, devoting themselves to this very thing.
7 Render to all what is due them: tax to whom tax is due; custom to whom custom; fear to whom fear; honor to whom honor.
8 Owe nothing to anyone except to love one another; for he who loves his neighbor has fulfilled the law.