Ibn 'Umar (RAA) narrated, 'On the Day of Khaibar, the Messenger of Allah (ﷺ) allotted two shares for a horse, and one share (from the war booty) for the fighter. Agreed upon and the wording is from Al-Bukhari. (ID)
English reference (ID): Book 11, Hadith 1329 (ID)
Arabic reference (ID): Book 11, Hadith 1303 (ID)