NET
8 With flaming fire he will mete out punishment on those who do not know God and do not obey the gospel of our Lord Jesus.
Darby
8 in flaming fire taking vengeance on those who know not God, and those who do not obey the glad tidings of our Lord Jesus Christ;
KJV
8 In flaming fire taking vengeance on them that know not God, and that obey not the gospel of our Lord Jesus Christ: