Performing Hajj on behalf of a living person if he is incapable himself
حَدَّثَنَا مُحَمَّدُ بْنُ عَبْدِ اللَّهِ بْنِ نُمَيْرٍ، حَدَّثَنَا أَبُو خَالِدٍ الأَحْمَرُ، حَدَّثَنَا مُحَمَّدُ بْنُ كُرَيْبٍ، عَنْ أَبِيهِ، عَنِ ابْنِ عَبَّاسٍ، قَالَ أَخْبَرَنِي حُصَيْنُ بْنُ عَوْفٍ، قَالَ قُلْتُ يَا رَسُولَ اللَّهِ إِنَّ أَبِي أَدْرَكَهُ الْحَجُّ وَلاَ يَسْتَطِيعُ أَنْ يَحُجَّ إِلاَّ مُعْتَرِضًا . فَصَمَتَ سَاعَةً ثُمَّ قَالَ " حُجَّ عَنْ أَبِيكَ " .
It was narrated that Ibn ‘Abbas said: Husain bin ‘Awf told me: I said: “O Messenger of Allah, the command for Hajj has come but my father cannot perform Hajj unless he is tied to a saddle.” Some time passed, then he said: “Perform Hajj on behalf of your father.”