Sahih al-Bukhari Book 74, Hadith 61
Allah's Messenger (ﷺ) ordered us to do seven things and forbade us from seven. He ordered us to visit the
sick, to follow funeral processions, (to say) to a sneezer, (May Allah bestow His Mercy on you, if he
says, Praise be to Allah), to accept invitations, to greet (everybody), to help the oppressed and to help
others to fulfill their oaths. He forbade us to wear gold rings, to drink in silver (utensils), to use
Mayathir (silken carpets placed on saddles), to wear Al-Qissi (a kind of silken cloth), to wear silk,
Dibaj or Istabraq (two kinds of silk).
(the wife of the Prophet) Allah's Messenger (ﷺ) said, "He who drinks in silver utensils is only filling his `Abdomen with Hell Fire."
that the people were in doubt whether the Prophet (ﷺ) was fasting on the Day of `Arafat or not, so a (wooden) drinking vessel full of milk was sent to him, and he drank it.