In the lifetime of Allah's Messenger (ﷺ) , we used to give one Sa' of food (edible things) as Sadaqat-ul-Fitr (to the poor). Our food used to be either of barley, raisins (dried grapes), cottage cheese or dates.
Sahih al-Bukhari Book 24, Hadith 110
← Previous Hadith The Prophet (ﷺ) ordered the people to pay Zakat-ul-Fitr before going to the `Id prayer.

Sahih al-Bukhari Book 24, Hadith 109 Next Hadith → Ibn `Umar said, "The Prophet (ﷺ) made incumbent on every male or female, free man or slave, the payment of one Sa' of dates or barley as Sadaqat-ul-Fitr (or said Sadaqa-Ramadan)." The people then substituted half Sa' of wheat for that. Ibn `Umar used to give dates (as Sadaqat-ul-Fitr). Once there was scarcity of dates in Medina and Ibn `Umar gave barley. 'And Ibn `Umar used to give Sadaqat-ul- Fitr for every young and old person. He even used to give on behalf of my children. Ibn `Umar used to give Sadaqat-ul-Fitr to those who had been officially appointed for its collection. People used to give Sadaqat-ul-Fitr (even) a day or two before the `Id.

Sahih al-Bukhari Book 24, Hadith 111