القهار
كلمة (القهّار) في اللغة صيغة مبالغة من القهر، ومعناه الإجبار،...
Abu Ad-Dardā' (may Allah be pleased with him) reported that the Messenger of Allah (may Allah's peace and blessings be upon him) said: “Whoever protects the honor of his brother in his absence, Allah will protect his face from the Fire on the Day of Judgment.”
The Hadīth states the virtue of someone who defends the honor of his Muslim brother. If someone speaks ill of your Muslim brother in his absence, you must defend him, silence the backbiter, and deny the evil speech. If you fail to do so, you would be forsaking your Muslim brother.