The Difference Between the Stabilization of Ownership and the Stabilization of the Obligation

Question:
He says: Honorable Shaykh, may Allah grant you success, what is the difference between the stabilization of ownership and the stabilization of the obligation?

Answer:
As you know, if a debt is upon a person who has the right to annul the contract, such as a mukatab (a slave who has contracted to buy his freedom), zakah is not obligatory on it. Regarding the stabilization of the obligation, they say that when the fruit ripens and the grain hardens in the crops, the obligation becomes established. Yes, the obligation is stabilized, meaning it exists. However, the obligation is not stabilized until it is placed in the threshing floor. This has not come, if Allah wills; there is no report regarding the zakah of what comes out of the earth. Yes.