حَتّٰٓى اِذَا بَلَغَ مَغۡرِبَ الشَّمۡسِ وَجَدَهَا تَغۡرُبُ فِىۡ عَيۡنٍ حَمِئَةٍ وَّوَجَدَ عِنۡدَهَا قَوۡمًا ؕ قُلۡنَا يٰذَا الۡقَرۡنَيۡنِ اِمَّاۤ اَنۡ تُعَذِّبَ وَاِمَّاۤ اَنۡ تَتَّخِذَ فِيۡهِمۡ حُسۡنًا
Until he reached the boundary of (a locality towards) the West where he perceived the setting of the sun as if going down into a spring of (muddy black) hot water, and he found a people (living) there. We said: ‘O Dhu’l-Qarnain, (it is up to you) whether you punish them or treat them nicely.’