´Abu Hurairah narrated :` that the Prophet said: "When you pay the Zakat you have fulfilled what is required of you."
Explanation & Benefits
Shaykh Dr. Abdur Rahman Freywai
English Translation:
1:
That is, regarding wealth, there is no further obligatory right upon you for which you may be required to give from it.
As for zakat al-fitr (charity of breaking the fast) and other necessary expenditures, these are not among the rights of wealth;
the cause for their obligation is not the wealth itself, but rather other circumstantial factors, such as kinship, marriage, etc. Some have said that the obligation of these duties arose after zakat, therefore, objection on this basis is not valid.
Source: Sunan al-Tirmidhi – Majlis ‘Ilmi Dar al-Da‘wah, New Delhi Edition, Page: 618