Ahnaf bin Qays (may Allah have mercy on him) said: We were at the door of Sayyiduna Umar bin al-Khattab (may Allah be pleased with him), waiting for him to give us permission. A slave girl came out, and we said: Are you the concubine of the Commander of the Believers? She heard and said: I am not the concubine of the Commander of the Believers, nor am I lawful for him; I am part of the wealth of Allah. This was mentioned to Sayyiduna Umar bin al-Khattab (may Allah be pleased with him). He said: She has spoken the truth; she is not lawful for me, nor is she my concubine; she is part of the wealth of Allah. And I will tell you what is lawful for me from it: I have made lawful for myself from it two garments, one for summer and one for winter, and (what suffices me for) my Hajj, my Umrah, my food and the food of my household; and my share with the Muslims is like that of one man among them; I am not above them.
Hadith Referenceالسنن الكبرى للبيهقي / كتاب قسم الفيء والغنيمة / 13010