'Confident' in the Bible

In that day go forth do messengers from before Me in ships, To trouble confident Cush, And there hath been great pain among them, As the day of Egypt, for lo, it hath come.

And given hath the tree of the field its fruit, And the land doth give her increase, And they have been on their land confident, And they have known that I am Jehovah, In My breaking the bands of their yoke, And I have delivered them from the hand of those laying service on them.

And I have sent a fire against Magog, And against the confident inhabitants of the isles, And they have known that I am Jehovah.