The Prophet ﷺ (and Siraj in his version said, "I heard the Prophet ﷺ say"), "The likeness of the believers is like that of a single body. When one part of it is in pain, the rest responds to it."
حدثنا يونس وسريج قالا حدثنا حماد عن سماك بن حرب
أن النبي ﷺ وقال سريج في حديثه سمعت النبي ﷺ يقول مثل المؤمنين كمثل الجسد إذا ألم بعضه تداعى سائره
No references are available.
Its isnad is sahih, mentioned previously at 18271.