المؤمن
كلمة (المؤمن) في اللغة اسم فاعل من الفعل (آمَنَ) الذي بمعنى...
An-Nu‘mān ibn Bashīr (may Allah be pleased with him) reported that the Prophet (may Allah's peace and blessings be upon him) said: "The believers, in their mutual love, compassion, and sympathy are like a single body; if one of its organs suffers, the whole body will respond to it with sleeplessness and fever."
شرح الحديث :
The way the believers show mercy to one another, and communicate, and cooperate is similar to the relationship of a body with all its organs. If one organ feels pain, it will call upon the other organs to share the pain, resulting in sleeplessness and fever.