'Sign' in the Bible

Then God said, "I certainly will be with you. And this will be the sign for you that it is I who sent you: When you have brought the people out of Egypt, all of you will serve God on this mountain."

"Then if they don't believe you and respond to the first sign, they may respond to the second sign.

"When Pharaoh says to you, "Perform a miraculous sign,' then you are to say to Aaron, "Take your staff and throw it in front of Pharaoh.' It will become a serpent."

I'll make a distinction between my people and your people, and this sign will occur tomorrow."'"

The blood will be a sign for you on the houses where you are. I'll see the blood and pass over you. There will be no plague to destroy you when I strike the land of Egypt.

It is to be a sign for you on your hand and a reminder on your forehead, so that you may speak about the instruction of the LORD; for the LORD brought you out of Egypt with a strong show of force.

It is to be a sign on your hand and an emblem on your forehead, because the LORD brought us out of Egypt with a strong show of force.'"

"You are to tell the Israelis: "You are to certainly observe my Sabbaths because it's a sign between me and you from generation to generation, so you may know that I am the LORD who sanctifies you.

It is a sign forever between me and the Israelis, because the LORD made the heavens and the earth in six days, but on the seventh day he rested and was refreshed.'"