Nu'man b. Bashir reported Allah's Messenger (ﷺ) as saying:
The similitude of believers in regard to mutual love, affection, fellow-feeling is that of one body; when any limb of it aches, the whole body aches, because of sleeplessness and fever.
Reference: Sahih Muslim 2586 a In-book : Book 45, Hadith 84 USC-MSA web (English) : Book 32, Hadith 6258 (deprecated)
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