(70) باب فَرْضِ صَدَقَةِ الْفِطْرِ
Narrated Ibn `Umar:
Allah's Messenger (ﷺ) enjoined the payment of one Sa' of dates or one Sa' of barley as Zakat-ul-Fitr on every Muslim slave or free, male or female, young or old, and he ordered that it be paid before the people went out to offer the `Id prayer. (One Sa' = 3 Kilograms approx.) (ID)
Reference (ID): Sahih al-Bukhari 1503 (ID)
In-book reference (ID): Book 24, Hadith 104 (ID)
USC-MSA web (English) reference(deprecated numbering scheme): Vol. 2, Book 25, Hadith 579 (ID)