I was sitting behind the Messenger of Allah ﷺ who was riding a donkey while the sun was setting. He asked: Do you know where this sets ? I replied: Allah and his Apostle know best. He said: It sets in a spring of warm water (Hamiyah). (Using translation from Abū Dāʾūd 4002)
كُنْتُ رِدْفَ رَسُولِ اللَّهِ ﷺ وَهُوَ عَلَى حِمَارٍ فَرَأَى الشَّمْسَ حِينَ غَرَبَتْ فَقَالَ «يَا أَبَا ذَرٍّ أَيْنَ تَغْرُبُ هَذِهِ؟» فَقُلْتُ اللَّهُ وَرَسُولُهُ أَعْلَمُ قَالَ «فَإِنَّهَا تَغْرُبُ فِي عَيْنٍ حَامِيَةٍ» غَيْرَ مَهْمُوزَةٍ