Hadith #4002 (Sunan Abi Dawud)
Book: Dialects and Readings of the Qur'an (Kitab Al-Huruf Wa Al-Qira'at)
Narrator(s): Hajjaj bin al-Minhal حجاج بن المنهال, Ibn Jurayj ابن جريج, Muhammad bin 'Isa bin Hyan محمد بن عيسى بن حيان, Umar bin Ata'a bin Wraz عمر بن عطاء بن وراز
Grade: Sahih

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).

Source: https://parallelquran.com/hadith/sunan-abi-dawud-4002/