كتاب الأشربة
36  
The Book of Drinks
(13)
Chapter: The etiquette of eating and drinking, and rulings thereon
(13)
باب آدَابِ الطَّعَامِ وَالشَّرَابِ وَأَحْكَامِهِمَا ‏‏
Sahih Muslim 2021

Salama b. Akwa' reported on the authority of his father that a person ate in the presence of Allah's Messenger (ﷺ) with his left hand, whereupon he said:

Eat with your right hand. He said: I cannot do that, whereupon he (the Holy Prophet) said: May you not be able to do that. It was vanity that prevented him from doing it, and he could not raise it (the right hand) up to his mouth.
حَدَّثَنَا أَبُو بَكْرِ بْنُ أَبِي شَيْبَةَ، حَدَّثَنَا زَيْدُ بْنُ الْحُبَابِ، عَنْ عِكْرِمَةَ بْنِ عَمَّارٍ، حَدَّثَنِي إِيَاسُ بْنُ سَلَمَةَ بْنِ الأَكْوَعِ، أَنَّ أَبَاهُ، حَدَّثَهُ أَنَّ رَجُلاً أَكَلَ عِنْدَ رَسُولِ اللَّهِ صلى الله عليه وسلم بِشِمَالِهِ فَقَالَ ‏"‏ كُلْ بِيَمِينِكَ ‏"‏ ‏.‏ قَالَ لاَ أَسْتَطِيعُ قَالَ ‏"‏ لاَ اسْتَطَعْتَ ‏"‏ ‏.‏ مَا مَنَعَهُ إِلاَّ الْكِبْرُ ‏.‏ قَالَ فَمَا رَفَعَهَا إِلَى فِيهِ ‏.‏
Reference : Sahih Muslim 2021
In-book reference : Book 36, Hadith 142
USC-MSA web (English) reference : Book 23, Hadith 5011
  (deprecated numbering scheme)