'Signs' in the Bible

for false Christs and false prophets will arise, and they will provide signs and wonders in order to deceive, if [such a thing were] possible, even the elect [those God has chosen for Himself].

These signs will accompany those who have believed: in My name they will cast out demons, they will speak in new tongues;

And they went out and preached everywhere, while the Lord was working with them and confirming the word by the signs that followed.]