Topic summary
Sadaqa

Extracted from the Wikipedia article Sadaqah.
Quran
"Sadaqat" is used in the Quran to cover all kinds of charity. Zakat has been called sadaqat because it is also a kind of compulsory charity. It is an obligatory sadaqa while ordinary sadaqa are voluntary. Thus, zakat has to be collected by the muhtasib (collector) or the government (the Islamic state) as a compulsory levy.