From Sahih Bukhari (Hadith 1405):
Narrated Abu Sa`id:Allah's Messenger (ﷺ) 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)
Reference: Bukhari 1405