كتاب صفة النبى صلى الله عليه وسلم
49  
The Description of the Prophet, may Allah Bless Him and Grant Him Peace

Yahya related to me from Malik that Sadaqa ibn Yasar said, "I asked Said ibn al-Musayyab about wearing a ring. He said, 'Wear it, and tell people that I gave you that decision.' "

وَحَدَّثَنِي عَنْ مَالِكٍ، عَنْ صَدَقَةَ بْنِ يَسَارٍ، أَنَّهُ قَالَ سَأَلْتُ سَعِيدَ بْنَ الْمُسَيَّبِ عَنْ لُبْسِ الْخَاتَمِ، فَقَالَ الْبَسْهُ وَأَخْبِرِ النَّاسَ، أَنِّي أَفْتَيْتُكَ بِذَلِكَ ‏.‏
USC-MSA web (English) reference : Book 49, Hadith 38
Arabic reference : Book 49, Hadith 1712