if works is anything you can do then repentance is a work. Some might argue then that repentance is not necessary.
These verses might say other wise
Is Repentance a work? is someone saved before repenting?
Luk 24:47 and that repentance and remission of sins should be proclaimed in His name among all nations, beginning at Jerusalem.
Repentance and remission of sins are tied together
Act 5:31 God exalted him at his right hand as Leader and Savior, to give repentance to Israel and forgiveness of sins.
Act 11:18 When they heard these things they fell silent. And they glorified God, saying, "Then to the Gentiles also God has granted repentance that leads to life."
Repentance that leads to life
2Co 7:10 For godly grief produces a repentance that leads to salvation without regret, whereas worldly grief produces death.
that leads to salvation
2Ti 2:25 correcting his opponents with gentleness. God may perhaps grant them repentance leading to a knowledge of the truth,