عَنْ أَبِي سَعِيدٍ الْخُدْرِيِّ رَضِيَ اللَّهُ عَنْهُ قَالَ: كُنَّا نُؤَدِّي صَدَقَةَ الْفِطْرِ عَلَى عَهْدِ رَسُولِ اللَّهِ صَلَّى اللَّهُ عَلَيْهِ وَآلِهِ وَسَلَّمَ صَاعًا مِنْ شَعِيرٍ، صَاعًا مِنْ تَمْرٍ، صَاعًا مِنْ زَبِيبٍ، صَاعًا مِنْ أَقِطٍ، فَلَمَّا جَاءَ مُعَاوِيَةُ رَضِيَ اللَّهُ عَنْهُ جَاءَتِ السَّمْرَاءُ فَرَأَى أَنَّ مُدًّا يَعْدِلُ مُدَّيْنِ
It is narrated from Sayyiduna Abu Sa'id Khudri (may Allah be pleased with him), he says: In the time of the Messenger of Allah (peace and blessings be upon him), we used to give one sa’ each of barley, dates, raisins, and cheese as Sadaqat al-Fitr. But when Sayyiduna Muawiyah (may Allah be pleased with him) came (during his time for Hajj or Umrah), Syrian wheat had also arrived at that time. He expressed the opinion that one mudd of wheat is equivalent to two mudd of the other items.