Read Proverbs 23:7 Using Other Translations
For as he thinketh in his heart, so is he: Eat and drink, saith he to thee; but his heart is not with thee.
for he is like one who is inwardly calculating. "Eat and drink!" he says to you, but his heart is not with you.
They are always thinking about how much it costs. “Eat and drink,” they say, but they don’t mean it.