What is the ruling on a mother's salary if she does not perform her work fully, and what is the ruling on a father's money if he cheated on the cadre exam and leaves his work early, and is it obligatory to verify the mother's cheating? And what is the ruling on taking from the father's money if it is mixed with the unlawful for entertainment or donation?

Seeking what is lawful is commendable, but there is no obligation to investigate and scrutinize the source of a Muslim's wealth if their circumstances are concealed. Whatever a Muslim knows to be unlawful, they should avoid. What they do not know, they should base on the original principle, which is the lawfulness of the money.

What was mentioned about the parents regarding cheating, leaving early, and signing on behalf of others, does not render their money entirely unlawful. The majority of their money is lawful, and the ruling is based on the predominant element. Dealing with purely unlawful money is forbidden, but the ruling for mixed money is different; it is not absolutely forbidden. The concept of karaha tanzihiyya (disliked but not forbidden) is debatable, as the Prophet (peace be upon him) dealt with those whose lawful and unlawful money was mixed.

Based on this, dealing with and benefiting from the parents' money is lawful. We advise the questioner not to yield to waswasa (whispers of Satan leading to obsessive doubts), for it is a severe illness, and indulging in it leads to confusion and pathological doubt.