ويجوز للمشتري أن يزيد البائع في الثمن
Translation: The buyer may increase the price payable to the seller.
A sale is concluded for Rs 100,000. Later the purchaser voluntarily agrees to add Rs 5,000 to the contractual consideration. Quduri permits such an increase; the Hanafi commentaries explain its connection to the original price obligation subject to the governing conditions.
This is not a unilateral right to impose a higher price. Valid agreement and the relevant legal conditions matter, and the adjustment can affect some downstream cost-based calculations.