The Prophet ﷺ forbade that a man should drink while standing.  

أَنَّ رَسُولَ اللَّهِ ﷺ نَهَى أَنْ يَشْرَبَ الرَّجُلُ قَائِمًا  

‘Ali asked for water and he drank it while standing. He then said: some people disapprove of doing this (drinking while standing ), but I saw the Messenger of Allah ﷺ doing as I have done.  

أَنَّ عَلِيًّا دَعَا بِمَاءٍ فَشَرِبَهُ وَهُوَ قَائِمٌ ثُمَّ قَالَ إِنَّ رِجَالاً يَكْرَهُ أَحَدُهُمْ أَنْ يَفْعَلَ هَذَا وَقَدْ رَأَيْتُ رَسُولَ اللَّهِ ﷺ يَفْعَلُ مِثْلَ مَا رَأَيْتُمُونِي أَفْعَلُهُ