Valmiki Ramayana Bala Kanda Sarga 43 Shloka 27

ये च those, शापात् due to the curse, गगनात् from the sky, वसुधातलम् earth, प्रपतिता: had fallen, ते they, तत्र there, अभिषेकम् bath, कृत्वा having taken, गतकल्मषा: बभूवु: were absolved of their sins.

Those cursed to fall from heaven to earth were absolved of their sins after bathing there (in the waters of Ganga).