'Redeem Me' in the Bible

Or, Deliver me from the adversary's hand? Or, Redeem me from the hand of the oppressors?

But as for me, I will walk in mine integrity: Redeem me, and be merciful unto me.

Redeem me from the oppression of man: So will I observe thy precepts.

Plead thou my cause, and redeem me: Quicken me according to thy word.