Hadith
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
Sahih · Salim al-Hilali
Muwatta Malik 1686 ·Book 49, Hadith 16·Also available on sunnah.com·