Sahih Bukhari
Patients
Volume: 007 / Book Number: 070 / Hadith Number: 553
Narrated 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)