(17) باب تَرَاحُمِ الْمُؤْمِنِينَ وَتَعَاطُفِهِمْ وَتَعَاضُدِهِمْ
Nu'man b. Bashir reported Allah's Messenger (ﷺ) as saying:
The believers are like one person; if his head aches, the whole body aches with fever and sleeplessness.
Reference: Sahih Muslim 2586 c
In-book reference: Book 45, Hadith 86
USC-MSA web (English) reference(deprecated numbering scheme): Book 32, Hadith 6260