Sunnah of eating

The Prophet, (saws) said: “A Believer eats in one intestine, whereas a non-believer eats in seven intestines,” (Narrated by Ibn Umar and collected in Saheeh Muslim)

‘When one of you eats, he should mention Allaah's name (i.e. say ‘Bismillaah); if he forgets to mention Allaah's name at the beginning, he should say (when he remembers): I begin in the name of Allah at the beginning and at the end of it ( Bismillah awwalahu wa Akhirahoo).” (Tirmidhi - Narrated by Aaisha and collected by Abu Dawood)

The Prophet, (saws) said: “Do not eat with your left hand for shaitaan eats with his left hand,” (Narrated by Jabir (RA) , Sahih Muslim)

Abu Hurairah, (RA) reported that the Prophet (saws) never found fault with food. If he liked it, he would eat it, but if he disliked it, he just left it. So we should instead be grateful as instructed by Allaah: “O You who believe! Eat of the good things that we have provided for you and be grateful to Allaah, if it is He you worship.” )Surah Al-Baqarah Verse 17)

The Prophet, (saws) commanded us never to waste food, because food that we waste is eaten by shaitaan. He (saws) said: “The shaitaan is present with everyone of you in everything he does; he is even present when he eats food, so if any on of you drops a mouthful, he should remove away anything filthy on it and eat it and not leave it for the devil; and when he finished, he should lick his fingers for he does not know in what portion of his food the blessing ties.” (Narrated by Jabir (RA), Sahih Muslim)

The Prophet, :saws: said: “A Believer eats in one intestine, whereas a non-believer eats in seven intestines,” (Narrated by Ibn Umar and collected in Saheeh Muslim)
Therefore it is not for us to eat till we are completely satiated; rather we should eat such that the hunger goes but there is still room for more.

When we have finished eating, we should always remember Allaah and be grateful to Him, for He is ar-Razzaaq, the Provider and our Sustainer. We should express this gratitude in the manner in which the Prophet (saws) taught us. He (saws) said: “One who has eaten some food and then says: ‘All praise is for Allaah, who has given me this (food to eat] and provided me without any effort or power on my part’, he will have his sins forgiven. (Alhamdulillaahil-lazee at’amanaa haadha warazaqeenee min ghairi hawlin minnee wala quwwah).” (Narrated by Mu’aadh Ibn Anas(RA), collected by at-Tirmidhee and others)

We have an excellent opportunity to transform an everyday practice of eating and drinking into an act of worship and a source of blessing for us. Every mouthful of food we take will serve as a reminder of Alaah's great favor upon us and His Mercy and this in turn will cause us to earn favor with Allaah, for the Prophet (saws) said: “Indeed Allah is pleased with His servant who, when he eats a morsel, praises Him for it, or drinks a sip and then praises Him for it.”(Narrated by Anas (RA) and collected in Saheeh Muslim)

May Allaah grant us the ability to become of His thankful servants. Ameen.
source