If he had the chance to do hajj but did not do it, you must not take anything from his wealth to perform hajj with as this wealth belongs to heirs now. Whoever wants good deeds may perform hajj on his behalf or pay someone to do that for him.

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This hadeeth is authentic but it refers to the general Duaa that is not related to a specific form of worship such as after the five daily prayers as if it was a sunnah, it would have been reported to us that the Prophet salla Allahu alaihi sa sallam used to do it regularly.

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