Alms Tax: Weight Reducing Below the Nisab After Drying

Practical Laws of Islam as per the teachings of Ayatullah Sistani

Ruling 1887

If the weight of wheat, barley, dates, or grapes when they are wet reaches the niṣāb and reduces to below the niṣāb when they become dry, then zakat on them is not obligatory.

-Ayatullah Sistani, Practical Laws of Islam, Alms Tax (Zakat)