'Adversary' in the Bible

And he sheweth me Joshua the high priest standing before the messenger of Jehovah, and the Adversary standing at his right hand, to be an adversary to him.

And Jehovah saith unto the Adversary: 'Jehovah doth push against thee, O Adversary, Yea, push against thee doth Jehovah, Who is fixing on Jerusalem, Is not this a brand delivered from fire?'

For, before those days there hath been no hiring of man, Yea, a hiring of beasts there is none; And to him who is going out, And to him who is coming in, There is no peace because of the adversary, And I send all men -- each against his neighbour.