A:
It is
permissible for a son to perform Hajj using his father's money. Regarding the case mentioned in the question, it is preferable that the son travels to perform Hajj with his father and assist him by driving the car. This is considered being dutiful to one's father.May Allah grant us success. May peace and blessings be upon our Prophet Muhammad, his family, and Companions.
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A son performing Haj...
