حَدَّثَنَا مُحَمَّدُ بْنُ رُمْحٍ الْمِصْرِيُّ، حَدَّثَنَا اللَّيْثُ بْنُ سَعْدٍ، عَنْ نَافِعٍ، عَنِ ابْنِ عُمَرَ، أَنَّ رَسُولَ اللَّهِ ـ صلى الله عليه وسلم ـ أَمَرَ بِزَكَاةِ الْفِطْرِ صَاعًا مِنْ تَمْرٍ أَوْ صَاعًا مِنْ شَعِيرٍ ‏.‏ قَالَ عَبْدُ اللَّهِ فَجَعَلَ النَّاسُ عِدْلَهُ مُدَّيْنِ مِنْ حِنْطَةٍ ‏.‏

It was narrated that

Ibn Abbas said: “The Messenger of Allah (ﷺ) enjoined Zakatul-Fitr as a purification for the fasting person from idle talk and obscenities, and to feed the poor. Whoever pays it before the (Eid) prayer, it is an accepted Zakah, and whoever pays it after the prayer, it is (ordinary) charity.”