Sunan at-Tirmithiy كتاب النذور والأيمان باب ما جاء فيمن يحلف بالمشى ولا يستطيع

حَدَّثَنَا أَبُو مُوسَى مُحَمَّدُ بْنُ الْمُثَنَّى حَدَّثَنَا خَالِدُ بْنُ الْحَارِثِ حَدَّثَنَا حُمَيْدٌ عَنْ ثَابِتٍ عَنْ أَنَسٍ قَالَ مَرَّ النَّبِىُّ صلى الله عليه وسلم بِشَيْخٍ كَبِيرٍ يَتَهَادَى بَيْنَ ابْنَيْهِ فَقَالَ مَا بَالُ هَذَا. قَالُوا يَا رَسُولَ اللَّهِ نَذَرَ أَنْ يَمْشِىَ. قَالَ إِنَّ اللَّهَ عَزَّ وَجَلَّ لَغَنِىٌّ عَنْ تَعْذِيبِ هَذَا نَفْسَهُ. قَالَ فَأَمَرَهُ أَنْ يَرْكَبَ.
The Prophet, peace and blessings of God be upon him, passed by an old man who was walking supported by his two sons. So he (the Prophet) asked, "What is the matter with him?" They replied, "Messenger of God, he vowed to walk (to pilgrimage)." He replied, "God, The Almighty and Sublime, is certainly in no need for this man to torture himself." Then he ordered the man to ride.