(45) باب خَوَاتِيمِ الذَّهَبِ
Narrated Al-Bara' bin `Azib:
The Prophet (ﷺ) forbade us to use seven things: He forbade using gold rings, silk, Istabraq, Dibaj, red Mayathir, Al-Qassiy, and silver utensils. He ordered us to do seven other things. To pay a visit to the sick; to follow funeral processions; to say, "May Allah be merciful to you" to a sneezer if he says "Praise be to Allah"; to return greetings, to accept invitations; to help others to fulfil their oaths and to help the oppressed ones.
Reference: Sahih al-Bukhari 5863
In-book reference: Book 77, Hadith 80
USC-MSA web (English) reference(deprecated numbering scheme): Vol. 7, Book 72, Hadith 753