Mark 16:15-18 (NKJV)
15 And He said to them, “Go into all the world and preach the gospel to every creature. 16 He who believes and is baptized will be saved; but he who does not believe will be condemned. 17 And these signs will follow those who believe: In My name they will cast out demons; they will speak with new tongues; 18 they will take up serpents; and if they drink anything deadly, it will by no means hurt them; they will lay hands on the sick, and they will recover.”