Chapter: The expenditure of the four-fifths of fay' in the time of the Messenger of Allah (peace and blessings be upon him), and that they were exclusively for him (peace and blessings be upon him), to the exclusion of the Muslims; he (peace and blessings be upon him) would spend them wherever Allah, the Mighty and Majestic, showed him (to be appropriate).
Hadith Referenceالسنن الكبرى للبيهقي / كتاب قسم الفيء والغنيمة / Q12724