'Adversary' in the Bible

If I have done my well-wisher evil, And draw mine adversary without cause,

Thou causest us to turn backward from an adversary, And those hating us, Have spoiled for themselves.

Till when, O God, doth an adversary reproach? Doth an enemy despise thy name for ever?

They have not remembered His hand The day He ransomed them from the adversary.

And He giveth His strength to captivity, And His beauty into the hand of an adversary,

Let the redeemed of Jehovah say, Whom He redeemed from the hand of an adversary.

Appoint Thou over him the wicked, And an adversary standeth at his right hand.