Zakat is one of the important pillar in Islam as all we have possessed in terms of properties in this life will be accounted for in the hereafter. Allah (swt) is a kind God and his prophets enjoin kindness from believers and giving alm is one of the ways you can show kindness to the poor.
Allah (swt) said in Quaran 2:254 that “O you who believed! spend from that which We have provided for you before there comes a Day in which there is no exchange and no friendship and no intercession. And the disbelievers – they are the wrongdoers
Cooperation had a great place in our Prophet’s (saas) life. He informs us that the best of all aids given are the ones given in secret; this is in order to prevent one’s self from giving in charity in order that people look at us and tell us how good we are! Such an attitude shows a lack of sincerity. Our Prophet (saas) says:
A man who says that he fears Allah (swt) is the one who gives the sadaqa with his left hand without his right hand hearing it and whose eyes fill with tears while remembering Allah (swt) in secluded places. (Muslim)
Satan inspires fear for future in people so as to hinder them from giving away from that which Allah (swt) has blessed them with. This way, he drifts them into stinginess. Our Prophet (saas) says that this is a great danger for believers.
“Don’t be stingy so that Allah (swt) will not deprive you from His blessings. Don’t keep what is surplus of your possessions, so that Allah (swt) will not debar you from His grace. (Muslim)
On the Day of Judgment when there exists no shadow except for the shadow of the highest layer of heavens, Allah (swt) grants the one who gives time to the poor who is in dept or decides not to take his loan back, the shadow of the highest layer of heavens. Muslim)
Possessions of the owners of gold and silver who do not give the alms (zakat) become a chain on the Day of Judgment. He is cast into fire with these. This chain of fire brands his face and sides. When this chain of fire cools, it turns into fire again. On the Day of Judgment which is fifty thousand years in terms of our time this recurs until people are called to reckoning. (Sahih Bukhari)