Sahih Muslim Book - 36, Hadith - 5268

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 اللهِ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ بِشِمَالِهِ ، فَقَالَ: كُلْ بِيَمِينِكَ ، قَالَ: لاَ أَسْتَطِيعُ ، قَالَ: لاَ اسْتَطَعْتَ ، مَا مَنَعَهُ إِلاَّ الْكِبْرُ ، قَالَ: فَمَا رَفَعَهَا إِلَى فِيهِ.

Iyas bin Salamah bin Al-Akwa' narrated that his father told him that a man ate with his left hand in the presence of the Messenger of Allah (s.a.w). He said: "Eat with your right hand." He said: "I cannot." He said: "May you never be able to," for nothing was preventing him from doing so but arrogance. And he never raised it to his mouth again.