Surah Al-Kahf Verse 86 - English Translation by Dr Kamal Omar
Surah Al-Kahfحَتَّىٰٓ إِذَا بَلَغَ مَغۡرِبَ ٱلشَّمۡسِ وَجَدَهَا تَغۡرُبُ فِي عَيۡنٍ حَمِئَةٖ وَوَجَدَ عِندَهَا قَوۡمٗاۖ قُلۡنَا يَٰذَا ٱلۡقَرۡنَيۡنِ إِمَّآ أَن تُعَذِّبَ وَإِمَّآ أَن تَتَّخِذَ فِيهِمۡ حُسۡنٗا
until when he reached the setting place of the sun (i.e., the western limits of the state) he found it: it sets in a spring (of) black muddy hot (water). And he came across in its vicinity a nation. We (Allah) said (by inspiration): “O Dhul-Qurnain! Either you punish them (if you apprehend any treason or arrogance) or treat them with kindness (if they accept the authority of the Muslim state)