Bushayr bin Yasar (may Allah have mercy on him) said: When Allah Almighty granted Khaybar to His Prophet (peace and blessings be upon him) (as fay'), he (peace and blessings be upon him) divided it into thirty-six shares, each share combining a hundred shares. He set aside half of it (namely al-Watihah, al-Katibah and what was attached to them) for needs and for delegations and the like, and he set aside the other half (namely al-Shiqq, al-Natat and what was attached to them) and divided it among the Muslims; and the share of the Messenger of Allah (peace and blessings be upon him) was within what was attached to them.
Hadith Referenceالسنن الكبرى للبيهقي / كتاب قسم الفيء والغنيمة / 12825