Proverbs 23:7 (BSB)

for he is keeping track, inwardly counting the cost. “Eat and drink,” he says to you, but his heart is not with you.

From Proverbs 23. Also in the ESV.

Commentary on Proverbs 23:7

• Matthew Henry (Presbyterian), Matthew Henry's Complete Commentary on Proverbs 23:6-8: Those that are voluptuous and given to appetite (Pro 23:2) are glad to be where there is good cheer stirring, and those that are covetous and saving, that they may spare at home, will be glad to get a dinner at another man's table; and therefore both are here advised not to be forward to accept of every man's invitation, but especially not to thrust themselves in uninvited. Observe, 1.
• John Gill (Reformed Baptist), Exposition of the Old and New Testaments on Proverbs 23:7: For as he thinketh in his heart, so is he,.... He is not the man his mouth speaks or declares him to be, but what his heart thinks; which is discovered by his looks and actions, and by which he is to be judged of, and not by his words; eat and drink, saith he to thee, but his heart is not with thee; he...
• Keil & Delitzsch (Lutheran), Biblical Commentary on the Old Testament on Proverbs 23:6-8: Pro 23:6-8 There now follows a proverb with unequally measured lines, perhaps a heptastich: 6 Eat not the bread of the jealous, And let not thyself lust after his dainties; 7 For as one who calculates with himself, so is he: “Eat and drink,” saith he to thee; But his heart is not with thee.