C. F. Keil and Franz Delitzsch on Deuteronomy 15:9-10

Deu 15:9-10

Thus they were also to beware “that there was not a word in the heart, worthlessness,” i.e., that a worthless thought did not arise in their hearts (בּליּעל is the predicate of the sentence, as the more precise definition of the word that was in the heart); so that one should say, “The seventh year is at hand, the year of release,” sc., when I shall not be able to demand what I have lent, and “that thine eye be evil towards thy poor brother,” i.e., that thou cherishest ill-will towards him (cf. Deu 28:54, Deu 28:56), “and givest him not, and he appeals to Jehovah against thee, and it becomes sin to thee,” sc., which brings down upon thee the wrath of God.