What is the wisdom behind a wife observing a mourning period (iddah) for her husband for four months and ten days, while it is not permissible for her to mourn anyone else from her family, such as her father or brother, for more than three days?

The Sharia prohibited mourning for relatives for more than three days, and allowed a little of it as a减轻 to the grieving person. As for mourning for the husband for four months and ten days, it is part of the 'iddah (waiting period), aiming to fulfill the right of the deceased husband and to prevent the woman from adorning herself to attract other men during the 'iddah period. After the 'iddah ends, she is allowed to adorn herself to encourage suitors. This indicates the wisdom of the Sharia in safeguarding the interests of people.