The Book of Purification and its Sunnah
1/11. Chapter:
Remembrance of Allah the Mighty and Sublime while on the toilet and rings in the toilet
Sunan Ibn Majah
حَدَّثَنَا نَصْرُ بْنُ عَلِيٍّ الْجَهْضَمِيُّ، حَدَّثَنَا أَبُو بَكْرٍ الْحَنَفِيُّ، حَدَّثَنَا هَمَّامُ بْنُ يَحْيَى، عَنِ ابْنِ جُرَيْجٍ، عَنِ الزُّهْرِيِّ، عَنْ أَنَسِ بْنِ مَالِكٍ، أَنَّ النَّبِيَّ ـ صلى الله عليه وسلم ـ كَانَ إِذَا دَخَلَ الْخَلاَءَ وَضَعَ خَاتَمَهُ .
It was narrated from Anas bin Malik that: When the Prophet entered the toilet, he would take off his ring.
Reference : Sunan Ibn Majah 303In-book reference : Book 1, Hadith 37English translation : Vol. 1, Book 1, Hadith 303