Fiqh-us-Sunnah - 3.87

Hadith 3.87.1

Zakat ul-fitr is a type of sadaqah which must be paid by every Muslim, young and old, male and female, free and slave, at the end of the month of fasting (Ramadan).
Al-Bukhari and Muslim relate from Ibn 'Umar that he said: "The Prophet, upon whom be peace, enjoined the payment of one sa' of dates or one sa' of barley as zakat ul-fitr on every Muslim, young and old, male and female, free and slave."

Hadith 3.87.A

Purpose of Zakat ul-Fitr

Zakat ul-fitr was made obligatory in the month of Sha'ban in the second year of the hijrah. Its purpose is to purify one who fasts from any indecent act or speech and to help the poor and needy. This view is based upon the hadith reported by Abu Dawud, Ibn Majah, and ad-Daraqutni from Ibn 'Abbas. The Messenger of Allah, upon whom be peace, enjoined zakat ul-fitr on the one who fasts to shield one's self from any indecent act or speech and for the purpose of providing food for the needy. It is accepted as zakah for the person who pays it before the 'id salah, and it is sadaqah for the one who pays it after the salah.