Allah SWT says: فَإِنْ لَّمْ تَفْعَلُوا وَلَنْ تَفْعَلُوا فَاتَّقُوا النَّارَ الَّتِى وَقُودُهَا النَّاسُ وَالْحِجَارَةُ ۖ أُعِدَّتْ لِلْكٰفِرِينَ "But if you do not - and you will never be able to - then fear the Fire, whose fuel is men and stones, prepared for the disbelievers." (QS. Al-Baqara 2: Verse 24) * Via Qur'an English http://quran-en.com