It is narrated from Sayyiduna Nu’man bin Bashir (may Allah be pleased with him) that the Noble Prophet (peace and blessings be upon him) said: In mutual love, compassion, and mercy, the example of the believers is like that of a single body; when one limb suffers, the whole body responds with wakefulness and fever.

It is also narrated from Sayyiduna Nu’man bin Bashir (may Allah be pleased with him) that the Noble Prophet (peace and blessings be upon him) said: All believers are like a single person; when his head is in pain, the whole body feels the pain, and when his eye hurts, the entire body begins to ache.

Sayyiduna Abu Musa (may Allah be pleased with him) narrates that the Messenger of Allah (peace and blessings be upon him) said: A believer to another believer is like a building, parts of which strengthen one another.

Narrated from Sayyiduna Sahl bin Sa’d Sa’idi (may Allah be pleased with him) that the Messenger of Allah (peace and blessings be upon him) said: Surely, the relationship of a believer with other people of faith is like the relationship of the head with the body. A believer feels pain for other believers just as the whole body feels pain due to an illness in the head.

Khalid bin Abdullah Qasri said, while he was delivering a sermon on the pulpit: My father narrated to me from my grandfather that the Messenger of Allah, peace and blessings be upon him, said: Do you love Paradise? He replied: Yes. The Prophet, peace and blessings be upon him, said: Then whatever you like for yourself, like the same for your brother.

It is narrated from Sayyiduna Anas (may Allah be pleased with him) that the Noble Prophet (peace and blessings be upon him) said: A servant cannot be a believer until he desires for his brother the good and well-being that he desires for himself.