Sunan an-Nasa'i
Sunan an-Nasa'i 2517
أَخْبَرَنَا عَمْرُو بْنُ عَلِيٍّ، قَالَ حَدَّثَنَا يَحْيَى، قَالَ حَدَّثَنَا دَاوُدُ بْنُ قَيْسٍ، قَالَ حَدَّثَنَا عِيَاضٌ، عَنْ أَبِي سَعِيدٍ الْخُدْرِيِّ، قَالَ كُنَّا نُخْرِجُ فِي عَهْدِ رَسُولِ اللَّهِ صلى الله عليه وسلم صَاعًا مِنْ شَعِيرٍ أَوْ تَمْرٍ أَوْ زَبِيبٍ أَوْ أَقِطٍ فَلَمْ نَزَلْ كَذَلِكَ حَتَّى كَانَ فِي عَهْدِ مُعَاوِيَةَ قَالَ مَا أَرَى مُدَّيْنِ مِنْ سَمْرَاءِ الشَّامِ إِلاَّ تَعْدِلُ صَاعًا مِنْ شَعِيرٍ .
Amr ibn Ali reported: Yahya narrated to us: Dawud ibn Qays narrated to us: Iyad narrated to us, from Abu Saeed al-Khudri, who said: In the time of the Messenger of Allah ﷺ, we used to give one sa of barley, dates, raisins, or aqit. We continued doing so until the time of Muawiyah, who said: I think two mudd of Syrian wheat equal one sa of barley.
Translation notes
The source states the earlier food practice and then a comparison attributed to Muawiyah. Aqit is a dried curd product.