It is narrated from Sayyiduna Ibn Umar (may Allah be pleased with them both) that the Prophet (peace and blessings be upon him) prescribed Zakat al-Fitr of one sa’ of dates or one sa’ of barley upon all Muslims, male and female, free and slave.
Hadith Referenceمسند احمد / مسند المكثرين من الصحابة / 5303
Hadith Gradingحکم دارالسلام:إسناده صحيح ، خ : 1504، م : 984 .