الكهف — Al-Kahf Ayat 86
حَتّٰىٓ اِذَا بَلَغَ مَغْرِبَ الشَّمْسِ وَجَدَهَا تَغْرُبُ فِيْ عَيْنٍ حَمِئَةٍ وَّوَجَدَ عِنْدَهَا قَوْمًا ەۗ قُلْنَا يٰذَا الْقَرْنَيْنِ اِمَّآ اَنْ تُعَذِّبَ وَاِمَّآ اَنْ تَتَّخِذَ فِيْهِمْ حُسْنًا
Ḥattā iżā balaga magribasy-syamsi wajadahā tagrubu fī ‘ainin ḥami'atiw wa wajada ‘indahā qaumā(n), qulnā yā żal-qarnaini immā an tu‘ażżiba wa immā an tattakhiża fīhim ḥusnā(n).
"Until, when he reached the setting of the sun, he found it [as if] setting in a spring of dark mud, and he found near it a people. Allah said, "O Dhul-Qarnayn, either you punish [them] or else adopt among them [a way of] goodness.""