Adam Clarke's Bible Commentary Verse 1. When thou sittest to eat with a ruler ] When invited to the table of thy betters, eat moderately. Do not appear as if half starved at home.
Eat not of delicacies to which thou art not accustomed; they are deceitful meat; they please, but they do not profit. They are pleasant to the sight, the taste, and the smell; but they are injurious to health. These are prudential cautions; and should be carefully observed by all who would avoid the conduct of a clown, and desire to pass for a well-bred man.
Matthew Henry Commentary
Verses 1-3 - God's restraints of the appetite only say, Do thyself no harm.
Original Hebrew כי3588 תשׁב3427 ללחום3898 את854 מושׁל4910 בין995 תבין995 את853 אשׁר834 לפניך׃6440