'Sign' in the Bible

Take for yourself an iron pan, and set it for a wall of iron between you and the city: and set your face toward it, and it shall be besieged, and you shall lay siege against it. This shall be a sign to the house of Israel.

In their sight you shall bear it on your shoulder, and carry it forth in the dark; you shall cover your face, so that you don't see the land: for I have set you for a sign to the house of Israel.

Say, I am your sign: like as I have done, so shall it be done to them; they shall go into exile, into captivity.

and I will set my face against that man, and will make him an astonishment, for a sign and a proverb, and I will cut him off from the midst of my people; and you shall know that I am Yahweh.

Moreover also I gave them my Sabbaths, to be a sign between me and them, that they might know that I am Yahweh who sanctifies them.

and make my Sabbaths holy; and they shall be a sign between me and you, that you may know that I am Yahweh your God.

Thus Ezekiel shall be a sign to you; according to all that he has done, you will do. When this comes, then you will know that I am the Lord Yahweh.

In that day your mouth will be opened to him who has escaped, and you shall speak, and be no more mute: so you will be a sign to them; and they shall know that I am Yahweh.

Those who pass through the land shall pass through; and when any sees a man's bone, then shall he set up a sign by it, until the undertakers have buried it in the valley of Hamon Gog.