It is narrated from Sayyiduna Abu Sa'id al-Khudri (may Allah be pleased with him) that the Messenger of Allah (peace and blessings be upon him) said: "There is no zakat on less than five camels, and there is no zakat on silver less than five awqiyahs, and there is no zakat on grain less than five wasqs."

It is narrated from Sayyiduna Abu Sa'id Khudri (may Allah be pleased with him) that the Messenger of Allah (peace and blessings of Allah be upon him) said: "There is no zakat on dates less than five wasq, and there is no zakat on silver less than five uqiyyah, and there is no zakat on less than five camels."

Imam Malik (may Allah have mercy on him) was informed that Umar bin Abdul Aziz (may Allah have mercy on him) wrote to his governor in Damascus that zakat is on gold, silver, crops, and livestock.
Imam Malik (may Allah have mercy on him) said that charity (zakat) is only due on three things: crops, gold and silver, and livestock.