It is narrated from Sayyiduna Thawban (may Allah be pleased with him) that he said: the Prophet (peace and blessings be upon him) said: "Whoever visits a sick person remains in the khurfah of Paradise." It was asked: What is the khurfah of Paradise? He (peace and blessings be upon him) said: "Its harvested fruit."
Hadith Referenceالمعجم الكبير للطبراني / باب الثاء / 1432