The Book of the Believer · Hadith 86 (#Ḥadīth #3)

86 - وعن أبي عبد الله (ع) أنه قال المؤمن أخو المؤمن كالجسد الواحد، إذا اشتكى شيئاً منه وُجد ألمُ ذلك في سائر جسده لأنّ أرواحهم مِن روح الله تعالى، وإنّ روح المؤمن لأشدُّ اتصالاً بروح الله من اتصال شعاع الشمسِ بها.

86. It has been reported that Abu 'Abd Allah said: A believer is a brother to (another) believer like one body; when one part of it suffers, the pain is found all over the body; for their souls are from the Spirit of Allah [M.G]. The soul of a believer has a stronger bond to the Spirit of Allah than the bond of Sun rays to the Sun.

Gradings are classical jarḥ-wa-taʿdīl, name-matched to a rijāl index (not individually re-verified).