'Vainly' in the Bible

So these nations [superficially] feared the Lord; they also served their idols, as did their children and their children’s children, just as their fathers did, so do they to this day [the date of this writing].

Do not trust in oppression,And do not vainly hope in robbery;If riches increase, do not set your heart on them.

Let no one defraud you of your prize [your freedom in Christ and your salvation] by insisting on mock humility and the worship of angels, going into detail about visions [he claims] he has seen [to justify his authority], puffed up [in conceit] by his unspiritual mind,