It is narrated from Sayyiduna Anas bin Malik (may Allah be pleased with him) and Sa'id bin al-Musayyib (may Allah have mercy on him) that Umar bin al-Khattab (may Allah be pleased with him) registered (in the diwan) five thousand for the Muhajirun, four thousand for the Ansar, and four thousand for those of the sons of the Muhajirun who were not present at Badr. Among them were Umar bin Abi Salamah, Usamah bin Zayd, Muhammad bin Abdullah and Abdullah bin Umar (may Allah be pleased with them). Abd al-Rahman bin Awf (may Allah be pleased with him) said: Ibn Umar (may Allah be pleased with them both) is not one of these; he is such and such. Ibn Umar (may Allah be pleased with them both) said: If I have a right, give it to me; otherwise do not give me. Umar (may Allah be pleased with him) said to Ibn Awf: Register five thousand for him and register four thousand for me. Abdullah (may Allah be pleased with him) said: I do not want this. Umar (may Allah be pleased with him) said: By Allah, you and I will not both be at five thousand.
Hadith Referenceالسنن الكبرى للبيهقي / كتاب قسم الفيء والغنيمة / 12998