A man ate with his left hand in the presence of the Messenger of Allah (may Allah's peace and blessings be upon him), whereupon he said: "Eat with your right hand." The man said: I cannot do that. Thereupon, he said: "May you not be able to do that

The Prophet (may Allah's peace and blessings be upon him) saw a man eating with his left hand, so, he ordered him to eat with his right hand. The man lied and said, out of arrogance, that he could not do this. So, the Prophet (may Allah's peace and blessings be upon him) supplicated against him to be deprived of the ability to eat with his right hand.

Allah fulfilled His Prophet's supplication and the man's right hand was paralyzed and he could not raise it to his mouth after that with any food or drink.