Sahih Muslim Book 31, Hadith Number 6118.

Chapter : Allah’s Apostle (may peace be upon him) invoked blessings upon the tribes of Ghifar and Aslam.

Ibn ‘Umar reported Allah’s Messenger (may peace be upon him) as saying: Allah has granted pardon to the tribe of Ghifar and to the tribe of Aslam Allah has granted safety and as for Usayya tribe, they disobeyed Allah and His Messenger.