Sayyiduna Abu Juhayfah (may Allah be pleased with him) said: We came to the Prophet (peace and blessings be upon him) at al-Abtah in his red tent, and he (peace and blessings be upon him) said: "Who are you?" We said: Banu Amir. He (peace and blessings be upon him) said: "Welcome; you are from me."
Hadith Referenceالمعجم الكبير للطبراني / باب الواو / 18484