Al-Baqarah · 2:219

219. O Prophet! Your Companions ask you about wine (which refers to anything that impairs the mind or intoxicates it), with respect to the legal aspects of drinking, selling and purchasing it. They also ask you about gambling (which refers to wealth taken in a competition between two people in which both contribute to the winning total). Say in response to them: They both have many spiritual and material harms, such as loss of intellect and wealth and the creation of hatred and enmity. On the other hand, there are a few benefits, such as financial reward for the winner of a bet. However, the harm and sin resulting from them is greater than the benefit; so, a logical person should avoid such actions. This statement of Allah lays the foundation for the prohibition of wine. They also ask you, O Prophet, about the amount that they should spend in charity. Say in reply to them: Spend whatever is easy and in excess of your needs. With such clear explanations, Allah describes the sacred law to you so that you may reflect. Initially, this was the law regarding charity, but later Allah established the obligation of Zakat, which requires paying a set amount on certain possessions, if one has owned such possessions for a particular period of time.