Jami` at-Tirmidhi, Hadith 1879 ⓘ
Narrated Qatadah: From Anas: "The Prophet prohibited that a man should drink while standing." (Qatadah said:) So it was said: "And eating ?" He (Anas) said: "That is worse." [Abu 'Eisa said:] This Hadith is Hasan Sahih.
حَدَّثَنَا مُحَمَّدُ بْنُ بَشَّارٍ، حَدَّثَنَا ابْنُ أَبِي عَدِيٍّ، عَنْ سَعِيدِ بْنِ أَبِي عَرُوبَةَ، عَنْ قَتَادَةَ، عَنْ أَنَسٍ، أَنَّ النَّبِيَّ صلى الله عليه وسلم نَهَى أَنْ يَشْرَبَ الرَّجُلُ قَائِمًا . فَقِيلَ الأَكْلُ قَالَ ذَاكَ أَشَدُّ . قَالَ أَبُو عِيسَى هَذَا حَدِيثٌ حَسَنٌ صَحِيحٌ .
also referenced under: Book 26, Hadith 19 (In-Book) & Volume 3, Book 24, Hadith 1879 (DarusSalam)