Hadith
حَدَّثَنَا أَبُو نُعَيْمٍ، حَدَّثَنَا الأَعْمَشُ، عَنْ إِبْرَاهِيمَ التَّيْمِيِّ، عَنْ أَبِيهِ، عَنْ أَبِي ذَرٍّ ـ رضى الله عنه ـ قَالَ كُنْتُ مَعَ النَّبِيِّ صلى الله عليه وسلم فِي الْمَسْجِدِ عِنْدَ غُرُوبِ الشَّمْسِ فَقَالَ " يَا أَبَا ذَرٍّ أَتَدْرِي أَيْنَ تَغْرُبُ الشَّمْسُ ". قُلْتُ اللَّهُ وَرَسُولُهُ أَعْلَمُ. قَالَ " فَإِنَّهَا تَذْهَبُ حَتَّى تَسْجُدَ تَحْتَ الْعَرْشِ، فَذَلِكَ قَوْلُهُ تَعَالَى {وَالشَّمْسُ تَجْرِي لِمُسْتَقَرٍّ لَهَا ذَلِكَ تَقْدِيرُ الْعَزِيزِ الْعَلِيمِ}"
Narrated Abu Dharr:Once I was with the Prophet (ﷺ) in the mosque at the time of sunset. The Prophet (ﷺ) said, "O Abu Dharr! Do you know where the sun sets?" I replied, "Allah and His Apostle know best." He said, "It goes and prostrates underneath (Allah's) Throne; and that is Allah's Statement:-- 'And the sun runs on its fixed course for a term (decreed). And that is the decree of All-Mighty, the All-Knowing
Sahih
Sahih al-Bukhari 4802 ·Book 65, Hadith 324·Also available on sunnah.com·