Hadith #5222 (Sunan al-Nasa'i)
Book: The Book of Adornment
Narrator(s): Hajjaj bin al-Minhal حجاج بن المنهال, Ibn Jurayj ابن جريج, Yusuf bin Sa'id bin Muslim يوسف بن سعيد بن مسلم المصيصي

When entering the Khala’, the Messenger of Allah  would take off his ring.

Source: https://parallelquran.com/hadith/sunan-al-nasai-5222/