al-Laith bin Sa'd الليث بن سعد · Foods (Kitab Al-At'imah)

The Prophet (ﷺ) said: If any Muslim is a guest of people and is given nothing, it is the duty of every Muslim to help him to the extent of taking for him from their crop and property for the entertainment of one night.

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.