فَإِن لَّمۡ تَفۡعَلُواْ وَلَن تَفۡعَلُواْ فَٱتَّقُواْ ٱلنَّارَ ٱلَّتِي وَقُودُهَا ٱلنَّاسُ وَٱلۡحِجَارَةُۖ أُعِدَّتۡ لِلۡكَٰفِرِينَ
And if you do not -- and you will not -- then fear the Fire, whose fuel is men and stones, prepared for unbelievers
Author: A. J. Arberry