Messenger of Allah ﷺ made it incumbent on all the slave or free Muslims, male or female, to pay one Sa' of dates or barley as Zakat-ul-Fitr. (Using translation from Bukhārī 1504)
عَنْ رَسُولِ اللهِ ﷺ أَنَّهُ قَالَ إِنَّ زَكَاةَ الْفِطْرِ عَلَى كُلِّ حُرٍّ أَوْ عَبْدٍ مِنَ الْمُسْلِمِينَ صَاعٌ مِنْ تَمْرٍ أَوْ صَاعٍ مِنْ شَعِيرٍ