Sahih Bukhari
Merits of the Helpers in Madinah (Ansaar)
Volume: 005 / Book Number: 058 / Hadith Number: 139
Narrated Anas bin Malik:
Allah's Apostle said, "There is no life except the life of the Hereafter; so, O Allah! Improve the state of the Ansar and the Muhajirun." And Anas added that the Prophet also said, "O Allah! Forgive the Ansar."