'Folly' in the Bible

And in prophets of Samaria I have seen folly, They have prophesied by Baal, And cause my people -- Israel -- to err.

Because that they have done folly in Israel, and commit adultery with the wives of their neighbours, and speak a word in My name falsely that I have not commanded them, and I am He who knoweth and a witness -- an affirmation of Jehovah.