Zakat (Kitab Al-Zakat)
Dawud :: Book 9 : Hadith 1554
Narrated AbuSa'id al-Khudri:
The Prophet (peace_be_upon_him) said: There is no zakat payable (on grain or dates) on less than five camel-loads. The wasq (one camel-load) measures sixty sa' in weight.