Salmaan Faarisi Radiyallahu 'Anhu says:
"I have read in-the Tauraah, that performing wudu (washing the hands) after eating increases blessings. I mentioned this to Rasulullah Sallailahu 'Alayhi Wasallam. Rasulullah Sallallahu 'Alayhi Wasallam said: "Wudu before and after eating (washing the hands and mouth) increases blessings." (ID)
English reference (ID): Book 26, Hadith 178 (ID)
Arabic reference (ID): Book 27, Hadith 187 (ID)