Sahih Muslim Book 032, Hadith Number 6230.
Chapter : Merit of visiting the sick.
Thauban, the freed slave of Allah's Messenger (may peace be upon him), reported Allah's Messenger (may peace be upon him) as saying: He who visits the sick is supposed to remain in the fruit garden of Paradise. It was said: Allah's Messenger, what is this Khurfat-ul-jannah? He said: It is a place abounding in fruits.