Is the commission paid to a department manager in a hospital, who has no relation to the purchasing department, considered a bribe? And is it permissible for me to submit competitive bids to the hospital after giving this employee his commission?

If the favoritism shown by officials to their colleague in accepting your bid for competition is permissible, then if it is in choosing him over better and cheaper bids, the money paid is a forbidden bribe. The requested commission is a price for influence, and scholars have differed on the permissibility of compensation for it. The ruling we adopt is that it is not permissible to take a fee unless the person with influence incurs expenses and effort, otherwise it is forbidden, and this commission is closer to ill-gotten gain.