Jami` at-Tirmidhi 1846

Narrated Salman: "I read in the Tawrah that the blessing for food is in the Wudu' after it. So I mentioned that to the Prophet (ﷺ), telling him what I read in the Tawrah. So the Messenger of Allah (ﷺ) said: 'The food's blessing is in the Wudu' before it and the Wudu' after it.'" He said: There are narrations on this topic from Anas and Abu Hurairah. [Abu 'Eisa said:] We do not know of this Hadith except as a narration of Qais bin Ar-Rabi'. Qais [bin Ar-Rabi'] was graded weak in Hadith. Abu Hashim Ar-Rumani's (a narrator in the chain) name is Yahya bin Dinar