When any one of you intends to eat (meal), he should eat with his right hand. and when he (intends) to drink he should drink with his right hand, for the Satan eats with his left hand and drinks with his left hand.
The Book of Drinks - Sahih Muslim 2020a
This tradition from the Prophet Muhammad (peace be upon him) establishes the Islamic etiquette of using the right hand for eating and drinking, while prohibiting the use of the left hand for these acts of consumption.
Scholarly Commentary
The command to use the right hand for eating and drinking is among the comprehensive teachings of Islam that encompass both physical and spiritual dimensions. The right hand is designated for noble acts, while the left is reserved for cleansing and less honorable tasks.
The mention of Satan eating and drinking with his left hand serves as a powerful deterrent, illustrating how opposing the devil's practices is integral to Islamic conduct. This creates a spiritual distinction between the believer and the accursed Satan.
Scholars emphasize that this teaching applies when one is able to use the right hand. Exceptions are made for those with valid excuses such as injury or disability, as Islamic law is founded upon ease and removal of hardship.
This tradition falls under the broader category of "ādāb" (etiquettes) that refine human behavior and distinguish Muslim practice, transforming mundane acts like eating and drinking into acts of worship when performed according to prophetic guidance.