Sahih al-Bukhari 1505
Book 24: Obligatory Charity Tax (Zakat) · Narrated by Abu Sa`id
Arabic
حَدَّثَنَا قَبِيصَةُ، حَدَّثَنَا سُفْيَانُ، عَنْ زَيْدِ بْنِ أَسْلَمَ، عَنْ عِيَاضِ بْنِ عَبْدِ اللَّهِ، عَنْ أَبِي سَعِيدٍ ـ رضى الله عنه ـ قَالَ كُنَّا نُطْعِمُ الصَّدَقَةَ صَاعًا مِنْ شَعِيرٍ.
English translation
Narrated Abu Sa`id:We used to give one Sa' of barley as Sadaqat-ul-Fitr (per head)
Reference: Sahih al-Bukhari 1505, Book of Obligatory Charity Tax (Zakat). English translation by Dr. Muhammad Muhsin Khan.