Hadith 516680
Chapter 49: The Description of the Prophet, may Allah Bless Him and Grant Him Peace - كتاب صفة النبى صلى الله عليه وسلم
وَحَدَّثَنِي عَنْ مَالِكٍ، عَنْ عَامِرِ بْنِ عَبْدِ اللَّهِ بْنِ الزُّبَيْرِ، عَنْ أَبِيهِ، أَنَّهُ كَانَ يَشْرَبُ قَائِمًا .
Yahya related to me from Malik from Amir ibn Abdullah ibn az- Zubayr that his father used to drink while standing.
Reference Muwatta Malik 516680
USC-MSA web (English) reference : Book 49, Hadith 16