'Enemy' in the Bible

All your leaders have fled together; she is captured without using bows. All of you who were caught were captured together, although they had fled while the enemy was still far away.

The highways are deserted; travelers have quit the road. The enemy has broken treaties; he despises their witnesses, and respects no one.

Yet they rebelled and grieved his Holy Spirit; so he changed and became their enemy, and he himself fought against them.