'Signs' in the Bible

For there will rise up false Christs and false prophets, displaying signs and prodigies with a view to lead astray--if indeed that were possible--even God's own People.

And signs shall attend those who believe, even such as these. By making use of my name they shall expel demons. They shall speak new languages.

But they went out and made proclamation everywhere, the Lord working with them and confirming their Message by the signs which accompanied it.