Is it permissible for a woman who has been given a revocable divorce to leave her family's home to teach the Qur'an, given that she is in the first month of her 'iddah and her husband is ill with no hope of recovery?

A woman who has been divorced with a revocable divorce must observe her iddah (waiting period) in her husband's home. She is not permitted to leave except with his permission. She has the rights of wives and bears their responsibilities; otherwise, she would be sinning.