Sayyiduna Abdullah bin Umar (may Allah be pleased with them both) says that the Messenger of Allah (peace and blessings be upon him) made sadaqat al-fitr of Ramadan obligatory upon the people: "A sa' of dates or a sa' of barley, on behalf of every slave and free person, male and female, among the Muslims."
Hadith Referenceالسنن الكبرى للبيهقي / كتاب الزكاة / 7687
Sayyiduna Abdullah bin Umar (may Allah be pleased with them both) says that the Prophet (peace and blessings be upon him) "prescribed sadaqat al-fitr as a sa' of dates or barley on behalf of every free person and slave, male and female, young and old, among the Muslims, and the Prophet (peace and blessings be upon him) ordered that sadaqat al-fitr be paid before going out to the Eid prayer ground."
Hadith Referenceالسنن الكبرى للبيهقي / كتاب الزكاة / 7688
Abdullah bin Umar (may Allah be pleased with them both) says that the Messenger of Allah (peace and blessings be upon him) prescribed sadaqat al-fitr of Ramadan: "Upon every soul among the Muslims, whether slave or free, man or woman, young or old: a sa' of dates or barley."
Hadith Referenceالسنن الكبرى للبيهقي / كتاب الزكاة / 7689
It is narrated from Abdullah bin Umar (may Allah be pleased with them both) that he (peace and blessings be upon him) said: "Sadaqat al-fitr is obligatory upon every slave and free person among the Muslims: a sa' of dates or of barley."
Hadith Referenceالسنن الكبرى للبيهقي / كتاب الزكاة / 7690
Yahya bin Bukayr (may Allah have mercy on him) narrated the hadith with the same chain, that the Messenger of Allah (peace and blessings be upon him) said: "Sadaqat al-fitr is obligatory upon every free and slave Muslim, whether male or female: a sa' of dates or a sa' of barley."
Hadith Referenceالسنن الكبرى للبيهقي / كتاب الزكاة / 7691
Sayyiduna Abdullah bin Abbas (may Allah be pleased with them both) says that the Messenger of Allah (peace and blessings be upon him) "made sadaqat al-fitr obligatory as a purification of the fasts from idle talk and obscenity, and as food for the poor. Whoever pays it before the Eid, it is accepted; and whoever pays it after the prayer, it is an ordinary charity for him."
Hadith Referenceالسنن الكبرى للبيهقي / كتاب الزكاة / 7692
The correct (name in this chain) is Abu Yazid al-Khawlani, who was a truthful shaykh and from whom Ibn Wahb used to narrate. Abbas bin al-Walid al-Khallal also narrated this hadith from Marwan in the same way, and Abu Ahmad al-Hafiz mentioned him in al-Kuna, and his name is not known.
Hadith Referenceالسنن الكبرى للبيهقي / كتاب الزكاة / 7693