'Hostile' in the Bible

Now behold, I have made you today like a fortified city and like an iron pillar and like bronze walls against the whole land—against the [successive] kings of Judah, against its leaders, against its priests, and against the people of the land [giving you divine strength which no hostile power can overcome].

“Lift up your eyes and seeThose coming from the north.Where is the flock that was given to you [to shepherd],Your beautiful flock?