20 On the right they will devour, but still be hungry; on the left they will eat, but not be satisfied. Each will feed on the flesh of their own offspringa :

Read Isaiah 9:20 Using Other Translations

And he shall snatch on the right hand, and be hungry; and he shall eat on the left hand, and they shall not be satisfied: they shall eat every man the flesh of his own arm:
They slice meat on the right, but are still hungry, and they devour on the left, but are not satisfied; each devours the flesh of his own arm,
They will attack their neighbor on the right but will still be hungry. They will devour their neighbor on the left but will not be satisfied. In the end they will even eat their own children.