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
nasai-kubra:11657 – Isḥāq b. Ibrāhīm > ʿĪsá b. Yūnus b. Abū Isḥāq al-Sabīʿī > ʿUbaydullāh > Nāfiʿ > Ibn ʿUmar

[Machine] The Messenger of Allah ﷺ mandated the giving of Zakat al-Fitr upon the young and old, males and females, free persons and slaves, one saa' of dates or one saa' of barley. And it was narrated by Qutaybah, from Layth, from Nafi', and by Qutaybah, from Malik, from Nafi'.  

الكبرى للنسائي:١١٦٥٧ – عَنْ إِسْحَاقَ بْنِ إِبْرَاهِيمَ عَنْ عِيسَى بْنِ يُونُسَ بْنِ أَبِي إِسْحَاقَ السَّبِيعِيِّ عَنْ عُبَيْدِ اللهِ عَنْ نَافِعٍ عَنْ ابْنِ عُمَرَ قَالَ

فَرَضَ رَسُولُ اللهِ ﷺ صَدَقَةَ الْفِطْرِ عَلَى الصَّغِيرِ وَالْكَبِيرِ وَالذَّكَرِ وَالْأُنْثَى وَالْحُرِّ وَالْعَبْدِ صَاعًا مِن تَمْرٍ أَوْ صَاعًا مِنْ شَعِيرٍ [354] 11658 وَعَنْ قُتَيْبَةَ عَنِ اللَّيْثِ عَنْ نَافِعٍ بِهِ 11659 وَعَنْ قُتَيْبَةَ عَنْ مَالِكٍ عَنْ نَافِعٍ بِهِ  

See similar narrations below:

Collected by Bukhārī, Nasāʾī, Nasāʾī's Kubrá
bukhari:1512 – Musaddad > Yaḥyá > ʿUbaydullāh > Nāfiʿ > Ibn ʿUmar

Messenger of Allah ﷺ has made Sadaqat-ul-Fitr obligatory, (and it was), either one Sa' of barley or one Sa' of dates (and its payment was obligatory) on young and old people, and on free men as well as on slaves.  

البخاري:١٥١٢ – حَدَّثَنَا مُسَدَّدٌ حَدَّثَنَا يَحْيَى عَنْ عُبَيْدِ اللَّهِ قَالَ حَدَّثَنِي نَافِعٌ عَنِ ابْنِ عُمَرَ ؓ قَالَ

فَرَضَ رَسُولُ اللَّهِ ﷺ صَدَقَةَ الْفِطْرِ صَاعًا مِنْ شَعِيرٍ أَوْ صَاعًا مِنْ تَمْرٍ عَلَى الصَّغِيرِ وَالْكَبِيرِ وَالْحُرِّ وَالْمَمْلُوكِ  

nasai:2505 – Isḥāq b. Ibrāhīm > ʿĪsá > ʿUbaydullāh > Nāfiʿ > Ibn ʿUmar

"The Messenger of Allah enjoined Sadaqatul Fitr upon young and old, male and female, free and slave; a Sa' of dates or a Sa' of barley,"  

النسائي:٢٥٠٥ – أَخْبَرَنَا إِسْحَاقُ بْنُ إِبْرَاهِيمَ قَالَ أَنْبَأَنَا عِيسَى قَالَ حَدَّثَنَا عُبَيْدُ اللَّهِ عَنْ نَافِعٍ عَنِ ابْنِ عُمَرَ قَالَ

فَرَضَ رَسُولُ اللَّهِ ﷺ صَدَقَةَ الْفِطْرِ عَلَى الصَّغِيرِ وَالْكَبِيرِ وَالذَّكَرِ وَالأُنْثَى وَالْحُرِّ وَالْعَبْدِ صَاعًا مِنْ تَمْرٍ أَوْ صَاعًا مِنْ شَعِيرٍ  

nasai-kubra:2296 – Isḥāq b. Ibrāhīm > ʿĪsá / Ibn Yūnus > ʿUbaydullāh > Nāfiʿ > Ibn ʿUmar

"The Messenger of Allah enjoined Sadaqatul Fitr upon young and old, male and female, free and slave; a Sa' of dates or a Sa' of barley," (Using translation from Nasāʾī 2505)  

الكبرى للنسائي:٢٢٩٦ – أَخْبَرَنَا إِسْحَاقُ بْنُ إِبْرَاهِيمَ قَالَ أَخْبَرَنَا عِيسَى وَهُوَ ابْنُ يُونُسَ قَالَ حَدَّثَنَا عُبَيْدُ اللهِ عَنْ نَافِعٍ عَنِ ابْنِ عُمَرَ قَالَ

«فَرَضَ رَسُولُ اللهِ ﷺ صَدَقَةَ الْفِطْرِ عَلَى الصَّغِيرِ وَالْكَبِيرِ وَالذَّكَرِ وَالْأُنْثَى وَالْحُرِّ وَالْعَبْدِ صَاعًا مِنْ تَمْرٍ أَوْ صَاعًا مِنْ شَعِيرٍ»