The Messenger of Allah ﷺ said, "The Muslims are like a single body. If his eye is in pain, his whole body suffers, and if his head is in pain, his whole body suffers."
حدثني محمد بن عبد الله بن نمير حدثنا حميد بن عبد الرحمن عن الأعمش عن خيثمة
قال رسول الله ﷺ المسلمون كرجل واحد إن اشتكى عينه اشتكى كله وإن اشتكى رأسه اشتكى كله