(27) باب رَحْمَةِ النَّاسِ وَالْبَهَائِمِ
Narrated An-Nu`man bin Bashir:
Allah's Messenger (ﷺ) said, "You see the believers as regards their being merciful among themselves and showing love among themselves and being kind, resembling one body, so that, if any part of the body is not well then the whole body shares the sleeplessness (insomnia) and fever with it."
Reference: Sahih al-Bukhari 6011
In-book reference: Book 78, Hadith 42
USC-MSA web (English) reference(deprecated numbering scheme): Vol. 8, Book 73, Hadith 40