“Also I shook my lap, and said, So God shake out every man from his house, and from his labour, that performeth not this promise, even thus be he shaken out, and emptied. And all the congregation said, Amen, and praised the LORD. And the people did according to this promise.”
King James Version (KJV)
5:13 My lap - The extreme parts of my garment, which I first folded together, and then shook it and scattered it asunder. This was a form of swearing then in use.