Al-Mursalat 77:30

وَجَعَلْنَا فِيهَا رَوَاسِيَ شَامِخَاتٍ وَأَسْقَيْنَاكُم مَّاءً فُرَاتًا

And We placed therein lofty, firmly set mountains and have given you to drink sweet water.

وَيْلٌ يَوْمَئِذٍ لِّلْمُكَذِّبِينَ

Woe, that Day, to the deniers.

انطَلِقُوا إِلَىٰ مَا كُنتُم بِهِ تُكَذِّبُونَ

[They will be told], "Proceed to that which you used to deny.

لَّا ظَلِيلٍ وَلَا يُغْنِي مِنَ اللَّهَبِ

[But having] no cool shade and availing not against the flame."

إِنَّهَا تَرْمِي بِشَرَرٍ كَالْقَصْرِ

Indeed, it throws sparks [as huge] as a fortress,

كَأَنَّهُ جِمَالَتٌ صُفْرٌ

As if they were yellowish [black] camels.