Sunan an-Nasa'i 3854

Ahmad ibn Hafs reported to us; he said: My father narrated to me; he said: Ibrahim ibn Tahman narrated to me, from Yahya ibn Saʿid, from Humayd al-Tawil, from Anas ibn Malik, who said: The Messenger of Allah, peace and blessings be upon him, came upon a man being supported by his two sons. He asked, ‘What is the matter with him?’ They said, ‘He vowed to walk to the Kaʿbah.’ He said: ‘Allah gains nothing from this man’s making himself suffer.’ So he instructed him to ride.