Sahih Muslim
The Book of Virtue, Good Manners and Joining of the Ties of Relationship (Kitab Al-Birr was-Salat-I-wal-Adab)
Book Number: 032 / Hadith Number: 6230
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.