The same imagery is continued to describe the destructive wrath of the Lord. “The caul of the heart” means here the covering of the heart, not the pericardium, but the breast in which the claws of the beast are fastened.
Related Commentaries of Hosea 13:8
Hosea 13:8
8 I will meet them as a bear that is bereaved of her whelps, and will rend the caul of their heart, and there will I devour them like a lion: the wildb beast shall tear them.