Explanation of the author's statement: "And when the grain becomes hard and the ripening of the fruit becomes apparent, zakah becomes obligatory."

The Shaykh : We have previously mentioned that it is considered that the property must be owned by him at the time zakah becomes obligatory. So what is the time when zakah becomes obligatory? The author says "When the grain becomes hard", meaning the grain becomes strong and hard, so that it does not crush when pressed. "And the ripening of the fruit becomes apparent". This is in the fruit of the date palm, when it turns red or yellow, and in the grapes, when they become sweet, meaning instead of being hard, they become soft and sweet, and instead of being sour, they become sweet. So now, the appearance of ripening in the fruit of the date palm is what? That it turns red or yellow. And in the grapes? That they become sweet. And in the grains, that they become hard. He said "When the grain becomes hard and the ripening of the fruit becomes apparent, zakah becomes obligatory". Before that, it is not obligatory. Branching from this is that if the owner dies before zakah becomes obligatory, meaning before the grain becomes hard or the ripening of the fruit becomes apparent, then zakah is not obligatory upon him. It is obligatory upon whom? Upon the heir. And likewise, if he sells the date palms and they have fruit on them whose ripening has not become apparent, or if he sells the land and there is a crop in it whose grain has not become hard, then zakah is upon whom? Upon the buyer, because he removed it from his ownership before zakah became obligatory. Branching from this is also that if it is destroyed, even by his action, by cutting the fruit or harvesting the crop before it becomes hard, or cutting the fruit before its ripening becomes apparent, then there is no zakah upon him. Why? Because that is before zakah becomes obligatory. Yes. He says, if it is destroyed, and the obligation does not settle except by placing it in the threshing floor, then if it is destroyed before that without transgression or negligence, it is dropped. Yes.