'Foul' in the Bible

“But I will remove the northern army far away from you,And I will drive it into a parched and desolate land,With its forward guard into the eastern sea (Dead Sea)And with its rear guard into the western sea (Mediterranean Sea).And its stench will arise and its foul odor of decay will come up [this is the fate of the northern army in the final day of the Lord],For He has done great things.”