Is the money that the father saved for himself and the mother to perform the Hajj a part of his estate that must be divided, or is it the mother's right to use it for Hajj, knowing that the father passed away before performing the pilgrimage?

The money saved by the deceased father for his Hajj and his wife's Hajj is considered an inheritance. The daughter can claim what she spent from non-donated expenses, if her father was obliged to provide them and saved the money for her mother's Hajj, based on the condition of recourse. If the father gifted the money to his wife before his death and she did not take possession of it, the gift is invalid according to the Maliki school, and the money is considered an inheritance.