立地成佛

lay down butcher's knife, become a Buddha on the spot (idiom); instant rehabilitation; to repent and be absolved of one's crimes

to redeem oneself; to atone

to mend one's ways (idiom); to turn over a new leaf

to repent and start afresh (idiom); to turn over a new leaf

to become a Buddha; to attain enlightenment

lit. to wash one's heart and renew one's face (idiom); to repent sincerely and mend one's mistaken ways; to turn over a new leaf