عَنْ قَتَادَةَ عَنْ أَنَسِ بْنِ مَالِكٍ رَضِيَ اللَّهُ عَنْهُ أَنَّ رَسُولَ اللَّهِ صَلَّى اللَّهُ عَلَيْهِ وَآلِهِ وَسَلَّمَ نَهَى عَنِ الشُّرْبِ قَائِمًا قُلْتُ فَالْأَكْلُ قَالَ ذَاكَ أَشَدُّ
It is narrated from Sayyiduna Anas (may Allah be pleased with him) that the Noble Prophet (peace and blessings be upon him) forbade drinking water while standing. I asked: And eating? He said: That matter would be even more severe.