Proverbs 23:7

so he eats and drinks as if any one should swallow a hair, and do not bring him in to thyself, nor eat thy morsel with him:

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 as he thinks about the cost, so he is. “Eat and drink!” he says to you, but his heart is not with you.