﴿حَتَّىٰ إِذَا بَلَغَ مَغْرِبَ الشَّمْسِ وَجَدَهَا تَغْرُبُ فِي عَيْنٍ حَمِئَةٍ وَوَجَدَ عِنْدَهَا قَوْمًا ۗ قُلْنَا يَا ذَا الْقَرْنَيْنِ إِمَّا أَنْ تُعَذِّبَ وَإِمَّا أَنْ تَتَّخِذَ فِيهِمْ حُسْنًا﴾
86. Until, when he reached the setting place of the sun, he found it setting in a spring of black muddy (or hot) water. And he found near it a people. We (Allâh) said (by inspiration): "O Dhul-Qarnain! Either you punish them, or treat them with kindness."