Yahya related to me from Malik that Yahya ibn Said said, "I vowed to walk, but I was struck by a pain in the kidney, so I rode until I came to Makka. I questioned Ata ibn Abi Rabah and others, and they said, You must sacrifice an animal. When I came to Madina I questioned the ulama there, and they ordered me to walk again from the place from which I was unable to go on. So I walked."