Bad deeds are the fuel for hellfire
Fear God, avoid the consequences of (bad) deeds, wake up from sleep of negligence. have foresight, consider the consequences of deeds. Remember your dangerous previous deeds. Do not neglect the pressure of the grave, the interval between death and resurrection (Barzakh) and the difficulties which follow in there. Hell burns by bad deeds and behaviour of the human being, if the human being does not add to the hellfire with (bad) deeds and behaviour, hell is extinguished .
 Jahad-e-Akbar, Imam Khomeini (RA), Page 51.
America and Human Rights
What were the most important points of Luqman’s advice to his son?
Praying as a weapon