الآية رقم (12) - الَّذِي يَصْلَى النَّارَ الْكُبْرَى

(12) - ([He] who will [enter and] burn in the greatest Fire, (12))

The greatest fire is the hell. There is fire in this worldly life but when it is called “greatest” then it refers to fire of the hereafter where its dwellers will be punished permanently and will never die.