Musannaf Ibn Abi Shaybah

Hazrat Umar Anbari narrates that Hazrat Ubaidullah bin Abdullah bin Utbah once performed ablution but forgot to clean his nose. The boy had already taken away the ablution vessel. He said, "I forgot one command of the Messenger of Allah, peace and blessings be upon him." Then he called the boy back and put water into his nose twice.