'Sign' in the Bible

even the censers of these sinners against their own souls; and they have made them spread-out plates, a covering for the altar, for they have brought them near before Jehovah, and they are hallowed; and they are become a sign to the sons of Israel.'

And Jehovah saith unto Moses, 'Put back the rod of Aaron, before the testimony, for a charge, for a sign to the sons of rebellion, and thou dost remove their murmurings from off me, and they do not die;'

and the earth openeth her mouth, and swalloweth them and Korah, in the death of the company, in the fire consuming the two hundred and fifty men, and they become a sign;