The Book of the Believer · Hadith 92 (#Ḥadīth #9)
Chapter 3 | The bond that Allah has set amongst the believers
92 - وعن أبي عبد الله (ع) قال المؤمنونَ في تبارّهِم وتراحمِهِم و تعاطُفِهم كمثلِ الجسدِ إذا اشتكى تداعى له سائرُه بالسّهر والحُمّى.
92. It has been reported that Abu 'Abd Allah said: The believers in their reverence, affection and compassion for each other are like one body; when it falls ill, it affects all over with restlessness and fever.”
Gradings are classical jarḥ-wa-taʿdīl, name-matched to a rijāl index (not individually re-verified).