He was riding behind the Messenger of Allah [SAW], when a man came and said: "O Messenger of Allah, my mother is an old woman; if I put her on a mount she cannot sit firmly, and if I tie her, I fear that I may kill her." He said: "Do you think that if your mother owed a debt you would pay it off for her?" He said: "Yes." He said: "Then perform Hajj on behalf of your mother."
أَنَّهُ كَانَ رَدِيفَ النَّبِيِّ ﷺ فَجَاءَهُ رَجُلٌ فَقَالَ يَا رَسُولَ اللَّهِ إِنَّ أُمِّي عَجُوزٌ كَبِيرَةٌ إِنْ حَمَلْتُهَا لَمْ تَسْتَمْسِكْ وَإِنْ رَبَطْتُهَا خَشِيتُ أَنْ أَقْتُلَهَا فَقَالَ رَسُولُ اللَّهِ ﷺ أَرَأَيْتَ لَوْ كَانَ عَلَى أُمِّكَ دَيْنٌ أَكُنْتَ قَاضِيَهُ قَالَ نَعَمْ قَالَ فَحُجَّ عَنْ أُمِّكَ