When is the creditor permitted to demand repayment of a loan (Qard)?

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The creditor is permitted to demand the equivalent value of the loan immediately. This is because a loan creates a cause that necessitates the return of a like item (in fungibles), making the repayment due immediately, similar to the case of destruction/liability. If the loan was given in installments, the creditor may still demand the full amount at once, as all parts are due immediately, resembling a situation where multiple immediate sales are made, and the seller then demands the total price at once.