Loving for your brother what you love for yourself

On the authority of Abu Hamza Anas ibn Malik (may Allah be pleased with him), the servant of the Messenger of Allah (may Allah bless him and grant him peace), that the Prophet (may Allah bless him and grant him peace) said: "None of you truly believes until he loves for his brother what he loves for himself."

Related by al-Bukhari and Muslim.

[al-Bukhari 13; Muslim 45]