The ruling on demanding a loaned amount after the lender says it is yours

Question:
In the name of Allah, the Most Gracious, the Most Merciful. So he asks: I borrowed money from a person, and when I came to return it, he said, "It is yours." Then he came back and demanded it, saying, "I did not intend to give it to you, or did I?"

Answer:
This is a case of dispute; this is a dispute between you and one person. It must go to the court: either you give him the money, or you go to the court. Look, yes. But, I mean, for the sake of benefit, not as a ruling, but for the sake of benefit: if a person has a debt owed to him by another, and then he says, "I have gifted you what is in your liability," he has no right to take it back; because what is in the liability is like what has been received, and taking back a gift after it has been received is not valid. Yes.