Fussilat, 13 Ayah
41:13
فَإِنۡ أَعۡرَضُواْ فَقُلۡ أَنذَرۡتُكُمۡ صَٰعِقَةٗ مِّثۡلَ صَٰعِقَةِ عَادٖ وَثَمُودَ ١٣
Fa'in 'A`rađū Faqul 'Andhartukum Şā`iqatan Mithla Şā`iqati `Ādin Wa Thamūda
But if they turn away, then say, "I have warned you of a thunderbolt like the thunderbolt [that struck] 'Aad and Thamud.