The Messenger of Allah ﷺ saw a man being supported between his two sons.He asked, "What is the matter with him?"They replied, "Messenger of Allah, he vowed to perform the Hajj on foot."He said, "Allah has no need for him to torture himself. Let him ride."
حدثنا عفان حدثنا حماد أخبرنا حميد وثابت
أن رسول الله ﷺ رأى رجلا يهادى بين ابنين له فقال ما هذا فقالوا يا رسول الله نذر أن يحج ماشيا فقال إن الله لغني عن تعذيبه نفسه فليركب
Its chain of transmission is sahih. It was mentioned previously at 13452.