13 Preface فَإِن أَعرَضوا فَقُل أَنذَرتُكُم صاعِقَةً مِثلَ صاعِقَةِ عادٍ وَثَمودَAli Quli QaraiBut if they turn away, say, ‘I warn you of a thunderbolt, like the thunderbolt of ʿĀd and Thamūd.’