Fussilat · Ayah 13
فَإِنْ أَعْرَضُوا۟ فَقُلْ أَنذَرْتُكُمْ صَٰعِقَةً مِّثْلَ صَٰعِقَةِ عَادٍ وَثَمُودَ
But if they turn away, then say, "I have warned you of a thunderbolt like the thunderbolt [that struck] ʿAad and Thamūd.
Quran 41:13 (Fussilat) · Saheeh International, Noor International Center (QuranEnc v1.1.2)