It is narrated from Sayyiduna Ibn Umar (may Allah be pleased with them both) that the Prophet (peace and blessings be upon him) said: "Zakat al-Fitr of one sa’ of dates or one sa’ of barley is obligatory upon every Muslim, male and female, free and slave, young and old."
Hadith Referenceمسند احمد / مسند المكثرين من الصحابة / 5942
Hadith Gradingحکم دارالسلام:حديث صحيح، وهذا إسناد ضعيف لضعف عبد الله العمري، وهو متابع.