Hadith 588
Ibn Umar said: when the first emigrants came (to Madina), they stayed at al-‘Asbah (a place near Madina) before the advent of the Messenger of Allah ﷺ. Salim, the client of Abu Hudhaifah, acted as their imam, as he knew the Quran better than all of them, al-Haitham (the narrator) added: and Umar bin al-Khattab and Abu Salamah bin Abd al-Asad were among them.
Hadith 1614
Narrated Abdullah ibn Umar: The people during the lifetime of the Messenger of Allah ﷺ used to bring forth the sadaqah at the end of Ramadan when closing the fast one sa' of barley whose straw is removed, or of raisins. Abdullah said: When Umar (Allah be pleased with him) succeeded, and the wheat became abundant, Umar prescribed half a sa' of wheat instead of all these things.
Hadith 1715
Narrated Ali ibn Abu Talib: Bilal ibn Yahya al-Absi said: Ali found a dinar and purchased some flour with it. The seller of the flour recognised him and returned the dinar to him. Ali took it, deducted two qirat (carat) from it, and purchased meat with it.