Allah's Messenger (ﷺ) (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.)
Sahih al-Bukhari Book 24, Hadith 10
← Previous Hadith We went out with 'Abdullah bin 'Umar and a bedouin said (to 'Abdullah), "Tell me about Allah's saying: "And those who hoard up gold and silver (Al-Kanz - money, gold, silver etc., the Zakat of which has not been paid) and spend it not in the Way of Allah (V.9:34)." Ibn 'Umar said, "Whoever hoarded them and did not pay the Zakat thereof, then woe to him. But these holy Verses were revealed before the Verses of Zakat. So when the Verses of Zakat were revealed, Allah made Zakat a purifier of the property."

Sahih al-Bukhari Book 24, Hadith 9 Next Hadith → I passed by a place called Ar-Rabadha and by chance I met Abu Dhar and asked him, "What has brought you to this place?" He said, "I was in Sham and differed with Muawiya on the meaning of (the following verses of the Qur'an): 'They who hoard up gold and silver and spend them not in the way of Allah.' (9.34). Muawiya said, 'This verse is revealed regarding the people of the scriptures." I said, It was revealed regarding us and also the people of the scriptures." So we had a quarrel and Mu'awiya sent a complaint against me to `Uthman. `Uthman wrote to me to come to Medina, and I came to Medina. Many people came to me as if they had not seen me before. So I told this to `Uthman who said to me, "You may depart and live nearby if you wish." That was the reason for my being here for even if an Ethiopian had been nominated as my ruler, I would have obeyed him .

Sahih al-Bukhari Book 24, Hadith 11