It is narrated from Abu Huraira (may Allah be pleased with him) that the Messenger of Allah (peace and blessings be upon him) said: "The believer is a place of affection (entirely affectionate), and there is no good in the one who does not show affection to others nor do others show affection to him." Ahmad, and Imam Bayhaqi have both narrated these hadiths in Shu'ab al-Iman. Sahih, narrated by Ahmad and al-Bayhaqi in Shu'ab al-Iman.