It is narrated from Sayyiduna Abdullah bin Umar (may Allah be pleased with them both) that the Messenger of Allah (peace and blessings be upon him) sent us with a military detachment towards Najd, so each man received twelve camels as spoils of war, and the Messenger of Allah (peace and blessings be upon him) gave one camel each as a reward.
Hadith Referenceالسنن المأثورة / باب الجهاد / 629
Hadith Takhrijصحیح بخاری، المغازی، باب السریہ التی قبل نجد، رقم: 4338، صحیح مسلم، الجہاد والسیر، باب الانفال، رقم: 1750,1749۔