Adam Clarke on Luke 14:15

That shall eat bread in the kingdom of God - This is spoken in conformity to the general expectation of the Jews, who imagined that the kingdom of the Messiah should be wholly of a secular nature. Instead of αρτον, bread, EKMS-V, more than one hundred others, with some versions and fathers, read αριϚον, a dinner. This is probably the best reading, as it is likely it was a dinner at which they now sat; and it would be natural for the person to say, Happy is he who shall dine in the kingdom of God. It does not appear that there was any but this person present, who was capable of relishing the conversation of our Lord, or entering at all into its spiritual reference.