# Israel is a scattered flock driven away by lions

"Israel is like a sheep that lions scattered and drove away". Yahweh speaks of Israel as a flock of sheep that had run away from hungry lions. 

# Israel

This refers to all the people of Israel.

# the king of Assyria

This refers to the army of the king of Assyria.

# devoured him

The destruction of Israel by Assyria is spoken of as if Israel were a sheep that Assyria ate.

# Nebuchadnezzar king of Babylon

This refers to the army of Nebuchadnezzar king of Babylon.

# broke his bones

"destroyed Israel". The destruction of Israel is spoken of if it were a sheep which had its bones crushed by a lion.