Sahih Muslim
The Book of Pilgrimage (Kitab Al-Hajj)
Book Number: 007 / Hadith Number: 3180
Ibn 'Umar (Allah be pleased with them) reported Allah's Messenger (may peace be upon him) as saying: He who patiently endures the hardships of it (of this city of Medina), I would be an intercessor or a withness on his behalf on the Day of Resurrection.