The authority of Jesus.

A young boy sat in his living room, tells his mum there is large demon manifesting in the corner of the room. The mother use's the authority of Jesus name to get rid of the demon. In the book of Luke,10:19 Jesus says "Behold, I give you power to tread of on serpents and scorpions, and over all the power of the enemy: and nothing shall by any means hurt you".