The Ruling on the Decrease and Increase of Gold Prices During the Year and Its Effect on the Completion of the Nisab
How do I know that my wealth has reached the nisab, while the price of gold rises and falls every day?
Answer
I say, and with God's success: The measure is the possession of wealth amounting to 100 grams of gold at the end of the year, not during the year, and God knows best.