he was riding behind the Messenger of Allah and a man came and said: "O Messenger of Allah! My mother is an old woman and she cannot sit firmly in the saddle. If I tie her I fear that I may kill her." The Messenger of Allah said: "Don't you think that if your mother owed a debt you would pay it off?" He said: "Yes." Her said: "Then perform Hajj on behalf of your mother."(Shih) (Using translation from Nasāʾī 2643)  

أَنَّهُ كَانَ رَدِيفَ رَسُولِ اللهِ ﷺ فَجَاءَهُ رَجُلٌ فَقَالَ يَا رَسُولَ اللهِ إِنَّ أُمِّي عَجُوزٌ كَبِيرَةٌ وَإِنْ حَمَلْتُهَا لَمْ تَسْتَمْسِكْ وَإِنْ رَبَطْتُهَا خَشِيتُ أَنْ أَقْتُلَهَا فَقَالَ رَسُولُ اللهِ ﷺ «أَرَأَيْتَ لَوْ كَانَ عَلَى أُمِّكَ دَيْنٌ أَكُنْتَ قَاضِيَهُ؟» قَالَ نَعَمْ قَالَ «فَحُجَّ عَنْ أُمِّكَ»