Surah Al-Mursalat, ayah 30

ٱنطَلِقُوٓاْ إِلَىٰ ظِلّٖ ذِي ثَلَٰثِ شُعَبٖ ٣٠

Intaliqū ilā zillin dhī thalāthi shu'ab

Proceed to a shadow [of smoke] having three columns