Behold. Figure of speech Asterismos App-6.
corrupt. rebuke; as in Malachi 3:11.Psalms 106:9; Isaiah 17:13. Hebrew gaar. Occurs fourteen times. Always rendered rebuke" except here, and Jeremiah 29:27 ("reproved").
dung. refuse; always sacrificial. Occurs seven times.
feasts. Put by Figure of speech Metonymy (of Adjunct), App-6, for the sacrifices offered at the feasts.
it: i.e. the refuse.