It is narrated from Sayyiduna Ibn Umar (may Allah be pleased with them both) that the Messenger of Allah (peace and blessings be upon him) said: "The tribe of Aslam, may Allah keep it safe; the tribe of Ghifar, may Allah forgive it."
Hadith Referenceمسند احمد / مسند المكثرين من الصحابة / 5858