Sayyiduna Sahl bin Sa'd al-Sa'idi (may Allah be pleased with him) said that the Messenger of Allah (peace and blessings be upon him) said: "The believer is one who gives and receives affection, and there is no good in one who neither shows affection nor is shown affection."
Hadith Referenceالمعجم الكبير للطبراني / باب السين / 5723