Sunan an-Nasa'i, Book 35, Hadith 92 (In-Book) ⓘ

It was narrated that Anas said: "The Prophet saw a man being supported by two others and said: 'What is this?' They said: 'He vowed to walk to the House of Allah.' He said: 'Allah has no need for this man to torture himself. Tell him to ride.'"

أَخْبَرَنَا إِسْحَاقُ بْنُ إِبْرَاهِيمَ، قَالَ أَنْبَأَنَا حَمَّادُ بْنُ مَسْعَدَةَ، عَنْ حُمَيْدٍ، عَنْ ثَابِتٍ، عَنْ أَنَسٍ، قَالَ رَأَى النَّبِيُّ صلى الله عليه وسلم رَجُلاً يُهَادَى بَيْنَ رَجُلَيْنِ فَقَالَ ‏"‏ مَا هَذَا ‏"‏ ‏.‏ قَالُوا نَذَرَ أَنْ يَمْشِيَ إِلَى بَيْتِ اللَّهِ ‏.‏ قَالَ ‏"‏ إِنَّ اللَّهَ غَنِيٌّ عَنْ تَعْذِيبِ هَذَا نَفْسَهُ مُرْهُ فَلْيَرْكَبْ ‏"‏ ‏.‏