Tribute, Spoils, and Rulership (Kitab Al-Kharaj, Wal-Fai' Wal-Imarah)
Dawud :: Book 19 : Hadith 3009
Narrated Mujammi' ibn Jariyah al-Ansari,:
Khaybar was divided among the people of al-Hudaybiyyah. The Apostle of Allah (peace_be_upon_him) divided it into eighteen portions. The army contained one thousand and five hundred people. There were three hundred horsemen among them. He gave double share to the horsemen, and a single to the footmen.