Sahih Bukhari | Volume 7 | Hadith Number 553

Narrated by Al-Bara bin Azib
Allah's Apostle ordered us to do seven things and forbade us to do seven other things. He forbade us to wear gold rings, silk, Dibaj, Istabriq, Qissy, and Maithara; and ordered us to accompany funeral processions, visit the sick and greet everybody. (See Hadith No. 104)