Ibn Abbas (may Allah be pleased with him) narrates that the Messenger of Allah (peace and blessings be upon him) said to Abu Dharr (may Allah be pleased with him): "Abu Dharr! Which part (aspect) of faith is the strongest and most firm?" He replied, "Allah and His Messenger know best." The Prophet (peace and blessings be upon him) said: "Loving and supporting each other for the sake of Allah, loving for the sake of Allah, and harboring aversion for the sake of Allah." Weak, narrated by Al-Bayhaqi in Shu'ab al-Iman.