What is the ruling on not giving an employee his remaining wages after he ruined the work due to his lack of experience and his lying about it, which resulted in the project being shut down, even though the mediator had already paid him part of his wages?

If you are an intermediary between the supplier and the worker, and the supplier has paid the worker's full wage, then you must deliver the entire amount to the worker. However, if you accept the work from the supplier for a specific wage and then hire the worker, the amount the supplier gave you is rightfully yours, and the worker is entitled to the wage agreed upon between you if he performs the work. If the worker damages something, scholars differ regarding the liability of the joint worker (اجير مشترك). Some hold him absolutely liable, while others hold him liable only in cases of transgression or negligence.