'Lightness' in the Bible

And it came to pass through the lightness of her whoredom, that she defiled the land, and committed adultery with stones and with stocks.

Behold, I am against them that prophesy false dreams, saith the LORD, and do tell them, and cause my people to err by their lies, and by their lightness; yet I sent them not, nor commanded them: therefore they shall not profit this people at all, saith the LORD.