Verse 3
Behold, I will corrupt your seed - So as to render it unfruitful. Newcome translates, - "I will take away from you the shoulder." This was the part that belonged to the priest, Lev 7:32; Deu 18:3.
Spread dung upon your faces - Instead of receiving a sacrifice at your hands, I will throw your offerings back into your faces. Here God shows his contempt for them and their offerings.