Is the brother required to pay 50,0 Lebanese Lira to the mosque's donation committee after canceling the contract with an incompetent contractor who refused to return the amount?

The 'Ijarah (leasing/hiring) contract is a binding agreement, and neither party may unilaterally terminate it without the consent of the other, except for a valid reason. If the worker does not perform the required work, the employer (lessee) has the right to terminate the contract. The supervisor of the Waqf (endowment) is not liable unless there is transgression (ta'addi) or negligence (tafrit). Therefore, the committee does not have the right to demand that the person who brought the contractor pay the wage merely for bringing him, unless he transgressed and contracted with him despite knowing his incompetence, or was negligent in paying him the money before it was due.