10 hadith found in 'Obligatory Charity Tax After Ramadaan (Zakat ul Fitr)' of Sahih Bukhari.

(585) Narrated Ibn 'Umar: The Prophet ordered the people to pay Zakat-ul-Fitr before going to the 'Id prayer.

(586) Narrated Abu Said Al-Khudri: In the life-time of Allah's Apostle , we used to give one Sa' of food (edible things) as Sadaqat-ul-Fit,r (to the poor). Our food used to be either of barley, raisins (dried grapes), cottage cheese or dates.

(587) Narrated Nafi': Ibn 'Umar said, "The Prophet made incumbent on every male or female, free man or slave, the payment of one Sa' of dates or barley as Sadaqat-ul-Fitr (or said Sadaqa-Ramadan)." The people then substituted half Sa' of wheat for that. Ibn 'Umar used to give dates (as Sadaqat-ulFitr). Once there was scarcity of dates in Medina and Ibn 'Umar gave barley. 'And Ibn 'Umar used to give Sadaqat-ul-Fitr for every young and old person. He even used to give on behalf of my children. Ibn 'Umar used to give Sadaqatul-Fitr to those who had been officially appointed for its collection. People used to give Sadaqat-ul-Fitr (even) a day or two before the 'Id.

(588) Narrated Ibn 'Umar: Allah's Apostle has made Sadaqatul-Fitr obligatory, (and it was), either one Sa' of barley or one Sa' of dates (and its payment was obligatory) on young and old people, and on free men as well as on slaves.