[14].Surah Ibrahim {A.S} [Abraham (PBUH)]: Ayat 32

Ayat 32. Allah is He Who has created the heavens and the earth and sends down water (rain) from the sky, and thereby brought forth fruits as provision for you; and He has made the ships to be of service to you, that they may sail through the sea by His Command; and He has made rivers (also) to be of service to you. 
 

Hazrat Umar bin Abu Salama (May Allah be pleased with him) reported: Messenger of Allah  [SAWW](PBUH), said to me, "Mention Allah's Name (i.e., say Bismillah before starting eating), eat with your right hand, and eat from what is near you.''

[Al-Bukhari Book 07, Chapter 65, Hadith # 288]. 

Lesson : as mentioned above in Surah Ibrahim {A.S} Ayat 32. " thereby brought forth fruits as provision for you;" There are two things about this Hadith. First, we should start eating or drinking by pronouncing the Name of Allah. Second, we should eat from our side without stretching our hand to the side where someone else is eating. This may be the case when more than one or two people are eating the same kind of food from a single dish. Good manners do not allow it, yet in case a variety of food or fruit is lying before us on the table, we are free to take our pick.