وَلَيْسَ فِيمَا دُونَ أَرْبَعَةِ مَثَاقِيلَ صَدَقَةٌ عِنْدَ أَبِي حَنِيفَةَ.
Translation: According to Abu Hanifa, no additional zakat is due on an increment below four mithqals.
Half a mithqal is due at twenty. The due does not increase until another full four mithqals have accumulated.
Accordingly, for more than twenty but less than twenty-four mithqals, the original half-mithqal due remains unchanged under this view.