Caution: Translations of Quran and Ḥadīth may lead to possible misapplications and misinterpretations. This site is intended for students of sacred knowledge that are proficient in comprehending classical Arabic and have a strong foundation in Islamic sciences. Also note that religious injunctions rely on several aspects beyond what one may glean through reading individual aḥādīth.
Qurʾān Bukhārī Muslim Nasāʾī Abū Dāwūd Tirmidhī Ibn Mājah Mālik Aḥmad Dārimī Ḥākim Ibn Ḥibbān Ṭabarānī Nasāʾī's Kubrá Bayhaqī al-Luʾluʾ wa-al-Marjān Ibn Rajab's Fifty Riyāḍ al-Ṣāliḥīn Aḥmad's Zuhd Suyūṭī
bukhari:1508 – ʿAbdullāh b. Munīr > Yazīd al-ʿAdanī > Sufyān > Zayd b. Aslam > ʿIyāḍ b. ʿAbdullāh b. Abū Sarḥ > Abū Saʿīd al-Khudrī

In the lifetime of the Prophet ﷺ we used to give one Sa' of food or one Sa' of dates or one Sa' of barley or one Sa' of Raisins (dried grapes) as Sadaqat-ul-Fitr. And when Muawiya became the Caliph and the wheat was (available in abundance) he said, "I think (observe) that one Mudd (of wheat) equals two Mudds (of any of the above mentioned things).  

البخاري:١٥٠٨ – حَدَّثَنَا عَبْدُ اللَّهِ بْنُ مُنِيرٍ سَمِعَ يَزِيدَ الْعَدَنِيَّ حَدَّثَنَا سُفْيَانُ عَنْ زَيْدِ بْنِ أَسْلَمَ قَالَ حَدَّثَنِي عِيَاضُ بْنُ عَبْدِ اللَّهِ بْنِ أَبِي سَرْحٍ

عَنْ أَبِي سَعِيدٍ الْخُدْرِيِّ ؓ قَالَ كُنَّا نُعْطِيهَا فِي زَمَانِ النَّبِيِّ ﷺ صَاعًا مِنْ طَعَامٍ أَوْ صَاعًا مِنْ تَمْرٍ أَوْ صَاعًا مِنْ شَعِيرٍ أَوْ صَاعًا مِنْ زَبِيبٍ فَلَمَّا جَاءَ مُعَاوِيَةُ وَجَاءَتِ السَّمْرَاءُ قَالَ أُرَى مُدًّا مِنْ هَذَا يَعْدِلُ مُدَّيْنِ  

See similar narrations below:

Collected by Bukhārī, Muslim
bukhari:1506 – ʿAbdullāh b. Yūsuf > Mālik > Zayd b. Aslam > ʿIyāḍ b. ʿAbdullāh b. Saʿd b. Abū Sarḥ al-ʿĀmirī > Abū Saʿīd al-Khudrī

We used to give one Sa' of meal or one Sa' of barley or one Sa' of dates, or one Sa' of cottage cheese or one Sa' of Raisins (dried grapes) as Zakat-ul-Fitr.  

البخاري:١٥٠٦ – حَدَّثَنَا عَبْدُ اللَّهِ بْنُ يُوسُفَ أَخْبَرَنَا مَالِكٌ عَنْ زَيْدِ بْنِ أَسْلَمَ عَنْ عِيَاضِ بْنِ عَبْدِ اللَّهِ بْنِ سَعْدِ بْنِ أَبِي سَرْحٍ الْعَامِرِيِّ

أَنَّهُ سَمِعَ أَبَا سَعِيدٍ الْخُدْرِيَّ ؓ يَقُولُ كُنَّا نُخْرِجُ زَكَاةَ الْفِطْرِ صَاعًا مِنْ طَعَامٍ أَوْ صَاعًا مِنْ شَعِيرٍ أَوْ صَاعًا مِنْ تَمْرٍ أَوْ صَاعًا مِنْ أَقِطٍ أَوْ صَاعًا مِنْ زَبِيبٍ  

muslim:985a – Yaḥyá b. Yaḥyá > Mālik > Zayd b. Aslam > ʿIyāḍ b. ʿAbdullāh b. Saʿd b. Abū Sarḥ > Abū Saʿīd al-Khudrī

We used to take out as the Zakat of Fitr one sa' of grain, or one sa' of barley or one sa' of dates, or one sa' of cheese or one sa' of raisins.  

مسلم:٩٨٥a – حَدَّثَنَا يَحْيَى بْنُ يَحْيَى قَالَ قَرَأْتُ عَلَى مَالِكٍ عَنْ زَيْدِ بْنِ أَسْلَمَ عَنْ عِيَاضِ بْنِ عَبْدِ اللَّهِ بْنِ سَعْدِ بْنِ أَبِي سَرْحٍ

أَنَّهُ سَمِعَ أَبَا سَعِيدٍ الْخُدْرِيَّ يَقُولُ كُنَّا نُخْرِجُ زَكَاةَ الْفِطْرِ صَاعًا مِنْ طَعَامٍ أَوْ صَاعًا مِنْ شَعِيرٍ أَوْ صَاعًا مِنْ تَمْرٍ أَوْ صَاعًا مِنْ أَقِطٍ أَوْ صَاعًا مِنْ زَبِيبٍ