Qur'an, Al-An'am, Suah 6:70
Avoid those who regard their religion as a hobby, as an idle pastime, and are seduced by the life of this world. Admonish them, lest their souls be damned by their own sins. They have no guardian or intercessor besides God; and even if they offer compensation to God, it will not be accepted from them. This is the condition of those who have been damned by their own sins. They will drink boiling water, and be sternly punished for their refusal to believe.