Zakat
The compulsory alms-giving which Allah has given the order for in the Qur'an
Zakah is only eligible upon mature, sane men and women who meet Nisab threshold. 2.5% of their wealth must then be given. Zakah must only be given to the specific eight categories mentioned in the Qur'an. If it is not given to any of them, then it will be void and necessary to re-pay.
So donate to charity Zakat and fulfill the right of your wealth that Allah has bestowed upon you.