Though he is fruitful among his brothers, an east wind will come, The breath of Yahweh coming up from the wilderness; And his spring will become dry, And his fountain will be dried up. He will plunder the storehouse of treasure.
This is, of course, the covenant that God had made with them, the covenant whereby they would be established in the land, the covenant whereby they would be blessed that they would worship the Lord God and have no other gods. But they had broken that covenant.God said,