Dishonest partiality leads men who have enslaved themselves to it to transgress, even when the inducement is altogether disproportionate. A “piece of bread” was proverbial at all times as the most extreme point of poverty (compare the marginal reference).
Related Commentaries of Proverbs 28:21
Proverbs 28:21
21 To have respect of persons is not good: for for a piece of bread that man will transgress.