Sunan An-Nasa'i

Abdullah bin 'Ubaidullah bin 'Abbas said:""We were sitting with 'Abdullah bin 'Abbas and he said: 'By Allah, the Messenger of Allah (ﷺ) did not say specifically anything for us above the people, except for three things: He commanded us to do Wudu' properly, [2] not to consume charity, and not to mate donkeys with horses.'"" [1] Isbagh Al-Wudu' [2] An Nusbig Al-Wudu