إلا القرض فإن تأجيله لا يصح
Translation: Except a loan: stipulating a binding deferment does not take effect in this classical formulation.
Quduri states a distinct classical Hanafi rule for loans: specification of a maturity does not carry the same binding legal effect as deferment of the ordinary debts just discussed. The commentaries relate this to the benevolent character of making a loan and the legal treatment of its repayment.
This is a question about the enforceability of a stipulated period, not a moral condemnation of granting a debtor time. Modern finance structures and applicable legislation may require further independent analysis.