The Book About the Etiquette of Eating
كتـــــاب أدب الطعام
Chapter 101: Prohibition of Criticizing Food
The Prophet (ﷺ) asked for sauce and was told that there was nothing except vinegar. He asked for it and began to eat from it saying, "How excellent is vinegar when eaten as sauce! How excellent is vinegar when eaten as Udm!"[Muslim].
Chapter 102: Response to an Invitation Extended to a Man Observing Saum (Fasting)
Chapter 103: What should One say to the Host if an Invited Person is Accompanied by an Uninvited Person
[Al-Bukhari and Muslim].
Chapter 104: Eating from What is in Front of One
[Al-Bukhari and Muslim].
A man ate with his left hand in the presence of Messenger of Allah (ﷺ), whereupon he said, "Eat with your right hand." The man said: "I cannot do that." Thereupon he (the Prophet (ﷺ)) said, "May you not be able to do that." It was vanity that prevented him from doing it and he could not raise it (the right hand) up to his mouth afterwards.[Muslim].
Chapter 105: Prohibition of Eating Two Dates Simultaneously
Chapter 106: What Should a Person Say or Do When He Eats and is Unsatisfied
Chapter 107: Eating from the Side of the Vessel
[Abu Dawud and At-Tirmidhi].
The Prophet (ﷺ) had a large bowl called Al-Gharra', which would be carried by four men. One day, when the Companions finished their Duha (forenoon optional) prayer, Al-Gharra' was brought full of sopped bread, meat and broth, and they sat down around it. When their number increased, Messenger of Allah (ﷺ) sat down on his knees and rested on the soles of his feet. A bedouin said to him: "What sort of sitting is that?" Thereupon Messenger of Allah (ﷺ) said, "Verily, Allah has made me a courteous slave not a fierce tyrant." Then he said, "Eat from the sides of the bowl and leave the central part of it so that your food will be blessed."[Abu Dawud].
Chapter 108: Undesirability of Eating in a Reclining Posture
[Al-Bukhari].
I saw Messenger of Allah (ﷺ) eating some dates while sitting on his buttocks, with his legs raised.[Muslim].
Chapter 109: Excellence of Eating with Three Fingers and Licking Them
I saw Messenger of Allah (ﷺ) eating with three fingers (i.e., the thumb, the index finger and the middle finger) and licking them after having finished the food.[Muslim].
The Messenger of Allah (ﷺ) commanded the licking of fingers and the gleaning of the dish, saying, "You do not know in which portion the blessing lies."[Muslim].
The Messenger of Allah (ﷺ) said, "When a morsel of any of you falls, he should pick it up and remove any of the dirt on it and then eat it, and should not leave it for Satan nor should wipe his hand with towel until he has licked his fingers, for he does not know in what portion of the food the blessing lies."[Muslim].
The Messenger of Allah (ﷺ) said, "Satan appears at every thing done by you; he appears even at one's dinner. When a morsel of any of you falls, he should pick it up and remove any dirt on it, and then eat it. He should not leave it for Satan, nor should he wipe his hand with the towel until he has licked his fingers, for he does not know in what portion of the food the blessing lies."[Muslim].
Whenever the Messenger of Allah (ﷺ) ate food, he would lick his three fingers and say, "If anyone of you drops a morsel of food, he should remove any dirt that may have stuck on it and then eat it, and should not leave it for Satan." He (ﷺ) also commanded us that we should glean the pot, saying, "You do not know in which part of your food the blessings lies."[Muslim].
I asked Jabir (May Allah be pleased with him) whether it was obligatory to make Wudu' for Salat (prayer) after eating cooked food. He said: "No, because in the lifetime of Messenger of Allah (ﷺ), such food was rarely available. We had no handkerchiefs, so when we ate such food we would wipe our fingers against our palms, forearms or (the sole of our) feet, and would offer Salat without fresh Wudu' (for prayer)."[Al- Bukhari].