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 uqiyah of silver, nor on less than five camels, nor on less than five wasq of dates."
Hadith Referenceالسنن الكبرى للبيهقي / كتاب الزكاة / 7243