'Folly' in the Bible

And the man, the master of the house, goeth out unto them, and saith unto them, 'Nay, my brethren, do not evil, I pray you, after that this man hath come in unto my house, do not this folly;

and I lay hold on my concubine, and cut her in pieces, and send her into all the country of the inheritance of Israel; for they have done wickedness and folly in Israel;

and we have taken ten men of a hundred, of all the tribes of Israel, and a hundred of a thousand, and a thousand of a myriad, to receive provision for the people, to do, at their coming to Gibeah of Benjamin, according to all the folly which it hath done in Israel.'