'Poor' in the Bible

Then I said, But these are the poor: they are foolish, for they have no knowledge of the way of the Lord or of the behaviour desired by their God.

They have become fat and strong: they have gone far in works of evil: they give no support to the cause of the child without a father, so that they may do well; they do not see that the poor man gets his rights.

Make melody to the Lord, give praise to the Lord: for he has made the soul of the poor man free from the hands of the evil-doers.

He was judge in the cause of the poor and those in need; then it was well. Was not this to have knowledge of me? says the Lord.