Fiqh-us-Sunnah Volume 1, Purification and Prayer, Fiqh 1.020A.

Section : One should remove any bad smell from his hands after cleaning himself.

Abu Hurairah said, “When the Messenger of Allah upon whom be peace, relieved himself, I used to bring him a container of water. He would cleanse himself, then rub his hands against the soil.” (Related by Abu Dawud, an-Nasa’i, al-Baihaqi, and Ibn Majah.)