Sunan an-Nasa'i 2504
سنن النسائي#2504Sahihأَخْبَرَنَا يَحْيَى بْنُ مُحَمَّدِ بْنِ السَّكَنِ، قَالَ حَدَّثَنَا مُحَمَّدُ بْنُ جَهْضَمٍ، قَالَ حَدَّثَنَا إِسْمَاعِيلُ بْنُ جَعْفَرٍ، عَنْ عُمَرَ بْنِ نَافِعٍ، عَنْ أَبِيهِ، عَنِ ابْنِ عُمَرَ، قَالَ فَرَضَ رَسُولُ اللَّهِ صلى الله عليه وسلم زَكَاةَ الْفِطْرِ صَاعًا مِنْ تَمْرٍ أَوْ صَاعًا مِنْ شَعِيرٍ عَلَى الْحُرِّ وَالْعَبْدِ وَالذَّكَرِ وَالأُنْثَى وَالصَّغِيرِ وَالْكَبِيرِ مِنَ الْمُسْلِمِينَ وَأَمَرَ بِهَا أَنْ تُؤَدَّى قَبْلَ خُرُوجِ النَّاسِ إِلَى الصَّلاَةِ .
It was narrated that Ibn 'Umar said:"The Messenger of Allah enjoined Zakatul-Fitr, a Sa' of dates or a Sa of barley, upon the free person and the slave, male and female, young and old, among the Muslims. He commanded that it be given before the people went out to the ('fd) prayer
Scholarly Authentication
The label above is the grade most of these scholars gave — one dissenting opinion no longer speaks for all of them. If any scholar calls a narration fabricated, that verdict is shown instead, whatever the others say. Each scholar's own wording:
In-book reference: 23:70