Ibn 'Umar said that the Messenger of Allah ﷺ prescribed the Sadaqa of Ramadan (Sadaqat-al-Fitr) one sa' of dates or one sa' of barley for every free man or a slave, male or female, and then the people equalised (one sa' of dates or barley) with half a sa' of wheat.
فَرَضَ النَّبِيُّ ﷺ صَدَقَةَ رَمَضَانَ عَلَى الْحُرِّ وَالْعَبْدِ وَالذَّكَرِ وَالأُنْثَى صَاعًا مِنْ تَمْرٍ أَوْ صَاعًا مِنْ شَعِيرٍ قَالَ فَعَدَلَ النَّاسُ بِهِ نِصْفَ صَاعٍ مِنْ بُرٍّ