He has some money but if he buys a car with it he will not be able to do Hajj

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Conditions of Hajj being obligatory
She took a riba-based loan and gave it to her brother to do Hajj

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The sick performing Hajj
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She was financially and physically able but she did not do Hajj because she had no mahram, then she died. Is it obligatory to do Hajj on her behalf?
Conditions of Hajj being obligatory
She took a riba-based loan and gave it to her brother to do Hajj

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