'Signs' in the Bible

for false Christs and false prophets will arise, and will show signs and wonders, in order to lead astray, if possible, the elect.

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

And they went out and preached everywhere, while the Lord worked with them, and confirmed the word by the signs that followed.][And they promptly reported all these instructions to Peter and his companions. And after that, Jesus Himself sent out through them from east to west the sacred and imperishable proclamation of eternal salvation.]