Explanation

Zakat is a form of alms-giving treated in Islam as a religious obligation, which, by Quranic ranking, is next after prayer in importance.

zakat is a religious duty for all Muslims who meet the necessary criteria of wealth. 

Zakat literally means Purification.

When Zakat was made compulsory in 2 A.H.

The word Zakat occurs 32 times in the Holy Quran.

Hazrat Abu Baker did Jihad on the issue of Zakat.

Without which act the prayer is useless? Zakat

One who disbelievers in Zakat is a Kafir