(71) باب صَدَقَةِ الْفِطْرِ عَلَى الْعَبْدِ وَغَيْرِهِ مِنَ الْمُسْلِمِينَ
Narrated Ibn `Umar:
Allah's Messenger (ﷺ) made it incumbent on all the slave or free Muslims, male or female, to pay one Sa' of dates or barley as Zakat-ul-Fitr.
Reference: Sahih al-Bukhari 1504
In-book reference: Book 24, Hadith 105
USC-MSA web (English) reference(deprecated numbering scheme): Vol. 2, Book 25, Hadith 580