Mishkat al-Masabih
Mishkat al-Masabih 4276
Arabic hadith text
وَعَنْ عَمْرِو بْنِ شُعَيْبٍ عَنْ أَبِيهِ عَنْ جده قَالَ: رَأَيْت رَسُول لله صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ يَشْرَبُ قَائِمًا وَقَاعِدًا. رَوَاهُ التِّرْمِذِيّ
Translation
Amr ibn Shuaib reported from his father, from his grandfather: I saw the Messenger of Allah ﷺ drink both while standing and while sitting. Al-Tirmidhi transmitted it.