(42) باب مَا الْوَاجِبُ عَلَى مَنْ أَوْجَبَ عَلَى نَفْسِهِ نَذْرًا فَعَجَزَ عَنْهُ .
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.'"
Reference: Sunan an-Nasa'i 3852
In-book reference: Book 35, Hadith 92
English translation: Vol. 4, Book 35, Hadith 3883