فَإِنۡ أَعۡرَضُواْ فَقُلۡ أَنذَرۡتُكُمۡ صَٰعِقَةٗ مِّثۡلَ صَٰعِقَةِ عَادٖ وَثَمُودَ
Fa-in a'radoo faqul anzartukum saa'iqatam misla saa'iqati 'Aadinw wa Samood
But if they turn away, say thou: "I have warned you of a stunning Punishment (as of thunder and lightning) like that which (overtook) the 'Ad and the Thamud!"
— Fusilat (فُصِّلَت), 41:13
