Sayyiduna Abu Sa'id al-Khudri (may Allah be pleased with him) said that the Messenger of Allah (peace and blessings be upon him) said: "There is no zakah on less than five uqiyahs of silver, there is no zakah on less than five wasqs of dates either, and there is no zakah on less than five camels either."
Imam al-Shafi'i (may Allah have mercy on him) said: The statement of the Prophet (peace and blessings be upon him) indicates that if five camels, five uqiyahs of silver or five wasqs of dates, any one of these, belong to a free Muslim, then zakah is due in the wealth itself, not on the owner; because if the owner fell short of that amount, no zakah would be due from him.
Hadith Referenceالسنن الكبرى للبيهقي / كتاب الزكاة / 7337