وَعَنْهُ أَيْضًا قَالَ قَالَ رَسُولُ اللَّهِ صَلَّى اللَّهُ عَلَيْهِ وَآلِهِ وَسَلَّمَ ((الْمُؤْمِنُ كَرَجُلٍ وَاحِدٍ إِذَا اشْتَكَى رَأْسُهُ اشْتَكَى كُلُّهُ إِنِ اشْتَكَى عَيْنُهُ اشْتَكَى كُلُّهُ))
It is also narrated from Sayyiduna Nu’man bin Bashir (may Allah be pleased with him) that the Noble Prophet (peace and blessings be upon him) said: All believers are like a single person; when his head is in pain, the whole body feels the pain, and when his eye hurts, the entire body begins to ache.