'Sign' in the Bible

And He said, “Certainly I will be with you, and this shall be the sign to you that it is I who have sent you: when you have brought the people out of Egypt, you shall worship God at this mountain.”

“If they will not believe you or heed the witness of the first sign, they may believe the witness of the last sign.

I will put a division between My people and your people. Tomorrow this sign will occur.”’”

The blood shall be a sign for you on the houses where you live; and when I see the blood I will pass over you, and no plague will befall you to destroy you when I strike the land of Egypt.

And it shall serve as a sign to you on your hand, and as a reminder on your forehead, that the law of the Lord may be in your mouth; for with a powerful hand the Lord brought you out of Egypt.

So it shall serve as a sign on your hand and as phylacteries on your forehead, for with a powerful hand the Lord brought us out of Egypt.”

“But as for you, speak to the sons of Israel, saying, ‘You shall surely observe My sabbaths; for this is a sign between Me and you throughout your generations, that you may know that I am the Lord who sanctifies you.

It is a sign between Me and the sons of Israel forever; for in six days the Lord made heaven and earth, but on the seventh day He ceased from labor, and was refreshed.”