Chapter 28: Foods (Kitab Al-At'imah)
Narrated Salman al-Farsi: I read in the Torah that the blessing of food consists in ablution before it. So I mentioned it to the Prophet (ﷺ). He said: The blessing of food consists in ablution before it and ablution after it. Sufyan disapproved of performing ablution before taking food. Abu Dawud said: It is weak.
Sunan Abi Dawud 3761