Ramayana
सीता हि विमला साध्वी तव पूर्वपरायणा । नागलोकं सुखं प्रायात्त्वदाश्रयतपोबलात् ॥ 7-98-14 ॥
Sita is indeed pure and chaste, ever devoted to you as before; by the power of her austerity, founded upon her refuge in you, she has gone happily to the world of the Nagas.
english translation