القاهر
كلمة (القاهر) في اللغة اسم فاعل من القهر، ومعناه الإجبار،...
Ibn ‘Umar (may Allah be pleased with him) reported that the Messenger of Allah (may Allah's peace and blessings be upon him) said: "If anyone of you eats, let him eat with his right hand, and if he drinks, let him drink with his right hand, for indeed the devil eats with his left hand and drinks with his left hand."
In this Hadīth, the Prophet (may Allah's peace and blessings be upon him) instructs the Muslims to eat and drink with their right hands. He forbids them to eat and drink with their left hands because the devil eats and drinks with his left hand. This indicates that the command in the Hadīth denotes obligation. Likewise, it is forbidden to eat and drink with the left hand, it being the practice and manner of the devil. The Muslims are commanded to avoid the ways of the disobedient people, let alone the devil. Anyone who imitates a people is indeed one of them.