Musnad Ahmad 1366
It was narrated that an-Nazzal bin Sabrah said:
We prayed Zuhr with ‘Ali (رضي الله عنه), then he went to a gathering that he used to hold in ar-Rahbah. He sat and we sat around him, then the time for ‘Asr came. A vessel (of water) was brought to him. He took a handful from it and rinsed his mouth and nose, and he wiped his face and forearms, and he wiped his head, and he wiped his feet. Then he stood up and drank what was left over in the vessel. Then he said: I have been told that some men dislike anyone to drink whilst standing, but I saw the Messenger of Allah (ﷺ) do what I have done.
حَدَّثَنَا عَبْد اللَّهِ، حَدَّثَنِي أَبُو خَيْثَمَةَ، وَحَدَّثَنَا إِسْحَاقُ بْنُ إِسْمَاعِيلَ، قَالَا حَدَّثَنَا جَرِيرٌ، عَنْ مَنْصُورٍ، عَنْ عَبْدِ الْمَلِكِ بْنِ مَيْسَرَةَ، عَنِ النَّزَّالِ بْنِ سَبْرَةَ، قَالَ صَلَّيْنَا مَعَ عَلِيٍّ رَضِيَ اللَّهُ عَنْهُ الظُّهْرَ فَانْطَلَقَ إِلَى مَجْلِسٍ لَهُ يَجْلِسُهُ فِي الرَّحَبَةِ فَقَعَدَ وَقَعَدْنَا حَوْلَهُ ثُمَّ حَضَرَتْ الْعَصْرُ فَأُتِيَ بِإِنَاءٍ فَأَخَذَ مِنْهُ كَفًّا فَتَمَضْمَضَ وَاسْتَنْشَقَ وَمَسَحَ بِوَجْهِهِ وَذِرَاعَيْهِ وَمَسَحَ بِرَأْسِهِ وَمَسَحَ بِرِجْلَيْهِ ثُمَّ قَامَ فَشَرِبَ فَضْلَ إِنَائِهِ ثُمَّ قَالَ إِنِّي حُدِّثْتُ أَنَّ رِجَالًا يَكْرَهُونَ أَنْ يَشْرَبَ أَحَدُهُمْ وَهُوَ قَائِمٌ إِنِّي رَأَيْتُ رَسُولَ اللَّهِ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ فَعَلَ كَمَا فَعَلْتُ‏.‏