Al Baqarah Ayah 24

فَإِن لَّمْ تَفْعَلُواْ وَلَن تَفْعَلُواْ فَٱتَّقُواْ ٱلنَّارَ ٱلَّتِى وَقُودُهَا ٱلنَّاسُ وَٱلْحِجَارَةُ‌ۖ أُعِدَّتْ لِلْكَـٰفِرِينَ ٢٤ But if you are unable to do so—and you will never be able to do so—then fear the Fire fuelled with people and stones, which is prepared for the disbelievers.