'Signs' in the Bible

for there shall arise false Christs and false prophets, and shall show signs and wonders, that they may lead astray, if possible, the elect.

And these signs shall accompany them that believe: in my name shall they cast out demons; they shall speak with new tongues;

And they went forth, and preached everywhere, the Lord working with them, and confirming the word by the signs that followed. Amen.