"We used to pay Zakaul Fitr when the Messenger of Allah was among us; a Sa' of food, or a Sa' of barley, or a Sa' of dates, or a Sa' of raisins, or a Sa of cottage cheese." (Using translation from Nasāʾī 2512)  

«كُنَّا نُخْرِجُ زَكَاةَ الْفِطْرِ إِذْ كَانَ فِينَا رَسُولُ اللهِ ﷺ صَاعًا مِنْ طَعَامٍ أَوْ صَاعًا مِنْ شَعِيرٍ أَوْ صَاعًا مِنْ تَمْرٍ أَوْ صَاعًا مِنْ زَبِيبٍ أَوْ صَاعًا مِنْ أَقِطٍ»  

"We used to pay Salaqatul Fitr when the Messenger of Allah was among us; a Sa' of food, or a Sa' of dates, or a Sa' of barley, or a Sa' of cottage cheese. We continued to do so until Mu'awiyah came from Ash-Sham and one of the things that he taught the people was when he said: I think that two Mudds of wheat from Ash-Sham are equivalent to a Sa' of this, So the people took to that." (Using translation from Nasāʾī 2513)  

كُنَّا نُخْرِجُ صَدَقَةَ الْفِطْرِ إِذْ كَانَ فِينَا رَسُولُ اللهِ ﷺ «صَاعًا مِنْ طَعَامٍ أَوْ صَاعًا مِنْ شَعِيرٍ أَوْ صَاعًا مِنْ تَمْرٍ أَوْ صَاعًا مِنْ زبيبٍ أَوْ صَاعًا مِنْ أَقِطٍ» فَلَمْ نَزَلْ كَذَلِكَ حَتَّى قَدِمَ مُعَاوِيَةُ الشَّامَ فَكَانَ فِيمَا عَلَّمَ النَّاسَ بِهِ أَنْ قَالَ مَا أَرَى مُدَّيْنِ مِنْ سَمْرَاءِ الشَّامِ إِلَّا تَعْدِلُ صَاعًا مِنْ هَذَا قَالَ وَأَخَذَ النَّاسُ بِذَلِكَ