The Book of the Believer · Hadith 91 (#Ḥadīth #8)

91 - وعنه (ع) قال لكُلّ شئٍ شئٌ يستريحُ إليه، وإنّ المؤمنَ يستريح إلى أخيهِ المؤمنِ كما يستريحُ الطّير ُإلى شَكله.

91. It has been reported that Abu 'Abd Allah said: For everything, there is a thing that gives it comfort; and a believer finds rest in the company of his fellow believer just as a bird finds comfort amongst its own kind.

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