The Prophet ﷺ said: There is no zakat payable (on grain or dates) on less than five camel-loads. The wasq (one camel-load) measures sixty sa' in weight.
عَنْ أَبِي سَعِيدٍ الْخُدْرِيِّ يَرْفَعُهُ إِلَى النَّبِيِّ ﷺ قَالَ لَيْسَ فِيمَا دُونَ خَمْسَةِ أَوْسُقٍ زَكَاةٌ وَالْوَسْقُ سِتُّونَ مَخْتُومًا