What is the ruling of Islamic law on leaving work before the end of the contract signed between the employee and the company, and is it better to wait until the end of the contract period or can it be left at any time?

A contract, once concluded between two parties, must be fulfilled, and neither party is permitted to annul it, due to the Almighty's saying: "O you who have believed, fulfill [your] contracts," and the Prophet's (peace be upon him) saying: "Muslims are bound by their conditions." An exception to this is the consent of the other party or the presence of a valid excuse preventing the completion of the agreed-upon work. Accordingly, the contract may not be rescinded before its end except with the consent of the employer or due to a legitimate excuse that prevents the completion of the work, as the contract of hire is among the contracts binding upon both parties.