Qais bin Sa'ad said: “The Messenger of Allah (ﷺ) enjoined Sadaqatul-Fitr upon is before (the command of) Zakat was revealed. He neither ordered us (to pay) nor forbade us (from paying it), so we did it.”
Sunan Ibn Majah Book 8, Hadith 46
← Previous Hadith Ibn Abbas said: “The Messenger of Allah (ﷺ) enjoined Zakatul-Fitr as a purification for the fasting person from idle talk and obscenities, and to feed the poor. Whoever pays it before the (Eid) prayer, it is an accepted Zakah, and whoever pays it after the prayer, it is (ordinary) charity.”

Sunan Ibn Majah Book 8, Hadith 45 Next Hadith → Abu Sa'eed Al-Khudri said: “We used to pay Zakatul-Fitr when the Messenger of Allah was among us, one Sa of food, one Sa of dates, one Sa of barley, one Sa of sun-baked cottage cheese, one Sa of raisins. We continued to do that until Mu'awiyah came to us in Al-Madinah. One of the things he said to the people was: 'I think that two Mudd wheat from Sham is equivalent to one Sa of this (i.e. dates).' So the people followed that.”Abu Sa'eed said: “I'll continue to pay it as I used to pay it at the time of Messenger of Allah for as long as I live.”

Sunan Ibn Majah Book 8, Hadith 47