Sahih Muslim | Book 23 | Hadith Number 5012

Narrated by 'Umar b. Abu Salama
'Umar b. Abu Salama reported: I was under the care of Allah's Messenger (way peace be upon him), and as my hand used to roam about in the dish he said to me: Boy, mention the name of Allah, and eat with your right hand and eat from what is near to you.