Ephesians 6:17-18

17 And take the helmet of salvation, and the sword of the Spirit, which is the word of God;  18 with all prayer and requests, praying at all times in the Spirit, and being watchful to this end in all perseverance and requests for all the saints: 

Mark 16:17

17 These signs will accompany those who believe: in my name they will cast out demons; they will speak with new languages;