It is mentioned that his parents are alive, and he wants to perform Hajj on their behalf, but should he start with the mother or the father?

Question:
It is mentioned that his parents are alive, and he wants to perform Hajj on their behalf, but with which one should he start? Should he start with the mother or the father? May Allah reward you with good.

Answer:
If his parents are still alive and he has not performed the Hajj of Islam, it is obligatory for them to perform the Hajj of Islam themselves. It is not permissible for someone to perform Hajj on behalf of a living person who is able to perform Hajj himself; it is not permissible to act as a proxy for him in the Hajj of Islam. Rather, he must perform Hajj himself if he is able, based on the saying of Allah the Exalted: As for if he has already performed Hajj for both of them, meaning if he has performed the Hajj of Islam for both of them, and he wants to perform a voluntary Hajj on their behalf, then the matter is broad in this regard, and praise be to Allah. It is better to start with his mother, because her right is more emphatic, as she is more deserving of kindness. May Allah reward you with good, and may He do you well