A hadith and commentary.
The Prophet, peace and blessings of Allah be upon him, said:
"The likeness of the believers in their mutual love, mercy, and compassion
is like a single body;
if one part of it suffers,
the rest of the body joins it in sleeplessness and fever."
Agreed upon.
Commentary:
The meaning of "the rest of the body joins it"
is that the parts of the body call upon one another to share in the pain.
This indicates, as Imam al-Nawawi, may Allah have mercy on him, stated,
the great importance of the rights Muslims owe to one another,
and it encourages them toward mercy, kindness, and mutual support.