´It was narrated that Ibn 'Umar said:` "At the time of the Messenger of Allah, the people used to give as Sadaqatul Fitr a Sa' of barely or dates or rye or raising."
Hadith ReferenceSunan an-Nasa'i / The Book of Zakah / Hadith: 2518
Hadith Gradingالألبانی:صحيح الإسناد | زبیر علی زئی:إسناده حسن