The Prophet ﷺ saw an old man walking, supported by his two sons, and asked about him. The people informed him that he had vowed to go on foot (to the Kaʿba). He said, "Allah is not in need of this old man's torturing himself," and ordered him to ride. (Using translation from Bukhārī 1865)   

ﷺ مَا بَالُ هَذَا؟ قَالُوا نَذَرَ يَا رَسُولَ اللهِ أَنْ يَمْشِيَ قَالَ إِنَّ اللهَ ﷻ عَنْ تَعْذِيبِ هَذَا نَفْسَهُ لِغَنِيٌّ وَأَمَرَهُ أَنْ يَرْكَبَ فَرَكِبَ  

[Machine] That the Prophet ﷺ saw a man being whipped between two men, so he said, "What is wrong with him?" They said, "He made a vow to walk to the Ka'bah." He said, "Surely Allah is rich and does not need to punish himself, so tell him to ride."  

أَنَّ النَّبِيَّ ﷺ رَأَى رَجُلًا يُهَادَى بَيْنَ رَجُلَيْنِ فَقَالَ مَا لَهُ؟ فَقَالُوا نَذَرَ أَنْ يَمْشِيَ إِلَى الْبَيْتِ قَالَ فَإِنَّ اللهَ ﷻ غَنِيٌّ عَنْ تَعْذِيبِ هَذَا نَفْسَهُ فَمُرُوهُ فَلْيَرْكَبْ  

Allah's Apostle ﷺ found an old man walking between his two sons supported by them, whereupon Allah's Apostle ﷺ said: What is the matter with him? He (the narrator) said: Messenger of Allah, they are his sons and there is upon him the (fulfilment) of the vow, whereupon Allah's Apostle ﷺ said: Ride, old man, for Allah is not in need of you and your vow. (Using translation from Muslim 1643a)   

أَنَّ رَسُولَ اللهِ ﷺ أَدْرَكَ شَيْخًا يَمْشِي بَيْنَ ابْنَيْهِ يَتَوَكَّأُ عَلَيْهِمَا فَقَالَ النَّبِيُّ ﷺ مَا شَأْنُ هَذَا الشَّيْخِ؟ قَالَ ابْنَاهُ كَانَ عَلَيْهِ نَذْرٌ فَقَالَ النَّبِيُّ ﷺ ارْكَبْ أَيُّهَا الشَّيْخُ فَإِنَّ اللهَ ﷻ غَنِيٌّ عَنْكَ وَعَنْ نَذْرِكَ لَفْظُهُمَا سَوَاءٌ