a man asked the Prophet "The command of ) Hajj has come while my father is an old man and cannot sit firmly in his saddle; if I tie him (to the saddle) I fear that he will die. Can I perform Hajj on his behalf?" He said: "don't you think that if your father owed a debt and you paid it off, that would be good enough?" He said: "Yes." He said: "Then perform Hajj on behalf of your father. " (Using translation from Nasāʾī 2640)
أَنَّ رَجُلًا سَأَلَ النَّبِيَّ ﷺ فَقَالَ يَا رَسُولَ اللهِ إِنَّ أَبِي أَدْرَكَهُ الْإِسْلامُ وَهُوَ شَيْخٌ كَبِيرٌ لَا يَثْبُتُ عَلَى رَاحِلَتِهِ أَفَأَحُجُّ عَنْهُ؟ قَالَ أَرَأَيْتَ لَوْ كَانَ عَلَيْهِ دَيْنٌ فَقَضَيْتَهُ عَنْهُ أَكَانَ يُجْزِيهِ؟ قَالَ نَعَمْ قَالَ فَاحْجُجْ عَنْ أَبِيكَ