Please note: this fatwa has been translated by artificial intelligence.
Question
My father passed away and did not perform Hajj due to his inability, and he also died young relative to the age permitted for Hajj. What is better and brings him more reward: appointing someone to perform Hajj on his behalf or constructing a water reservoir at a mosque as a continuous charity for him?
Answer
I say, and with God's help: If the conditions for Hajj are met and he has not performed Hajj, it is preferable to perform Hajj on his behalf. If the conditions for Hajj are not met, then giving charity on his behalf, as you have suggested, is preferable, and God knows best.