It is narrated from al-Zuhri that Umar (may Allah be pleased with him) preferred them over his own tribe. When the time of al-Mahdi came, al-Mahdi gave the order concerning Banu Adi, and they were put first in the allotment. And it is narrated from the Prophet (peace and blessings be upon him) that he (peace and blessings be upon him) said: 'Allahumma a'izz al-Islam bi-Umar' (O Allah, grant honour to Islam through Umar (may Allah be pleased with him)).
Hadith Referenceالسنن الكبرى للبيهقي / كتاب قسم الفيء والغنيمة / 13101