'Sign' in the Bible

Further, take an iron plate and place it as an iron wall between you and the city, and set your face toward it so that it is under siege, and besiege it. This is a sign to the house of Israel.

As they look on, load the provisions and supplies on your shoulder and carry it out in the dark. You shall cover your face so that you cannot see the land, for I have set you as a sign to the house of Israel.”

Say, ‘I am a sign to you. As I have done, so it will be done to them; they will go into exile, into captivity.’

I will set My face against that man [that hypocrite] and will make him a sign and a proverb, and I will cut him off from among My people; and you will know [without any doubt] that I am the Lord.

Also I gave them My Sabbaths to be a sign between Me and them, that they might know [without any doubt] that I am the Lord who sanctifies them (separates and sets them apart).

Sanctify My Sabbaths and keep them holy; and they shall be a sign between Me and you, that you may know [without any doubt] that I am the Lord your God.’

So Ezekiel will be a sign to you; in accordance with all that he has done you will do. And when this [destruction of the temple] comes, then you will know [without any doubt] that I am the Lord God.’”

On that day your mouth will be opened to him who escaped, and you will speak and no longer be mute. In this way you shall be a sign to them, and they will know [without any doubt] that I am the Lord.’”

As those who pass through the land pass through and anyone sees a human bone, he will set up a marker beside it, until the buriers have buried it in the Valley of Hamon-gog.