It is narrated from Sayyiduna Salamah (may Allah be pleased with him) that once the Prophet (peace and blessings be upon him) saw a man—whose name was Busar bin Ra’i al-‘Ir—eating with his left hand. The Prophet (peace and blessings be upon him) said: "Eat with your right hand." He replied, "I am not able to eat with my right hand." The Prophet (peace and blessings be upon him) said: "May you not be able to." After that, his right hand could not reach his mouth.
Hadith Referenceمسند احمد / مسند المدنيين رضي الله عنهم اجمعين / 16499