Sahih Bukhari
Obligatory Charity Tax (Zakat)
Volume: 002 / Book Number: 024 / Hadith Number: 487
Narrated Abu Said:
Allah's Apostle (p.b.u.h) said, "No Zakat is due on property mounting to less than five Uqiyas (of silver), and no Zakat is due on less than five camels, and there is no Zakat on less than five Wasqs." (A Wasqs equals 60 Sa's) & (1 Sa=3 K gms App.)