Musannaf Ibn Abi Shayba 7:270

Ibn Idris narrated to us, from Ubayd Allah ibn Umar and from Malik ibn Anas, from Urwah ibn Udhaynah. Ubayd Allah said: He narrated it to him. And Malik said: That her mother made a vow upon herself to walk, so she walked until she reached al-Suqya, then she became unable, so she did not walk. She asked Ibn Umar, and he said: "Command her to return from the coming year, and let her walk from where she became unable."