Ravan went near the girl and asked the reason behind her not getting married since now. Vedati named girl said that her father wants to marry her to Lord Vishnu. But, once a demon got charmed by her and killed her dad. In that sorrow her mother also died. From that day she has been meditating to get married to Lord Vishnu.
When Ravan came to know that the girl had no one, he tried wooing her with love. But on girl's refusal, he forcibly caught her hairs. Vedvati had cut her hairs which Ravan was holding. She immediately jumped in fire and died. Before going in fire she cursed Ravan saying "I will take birth in form of a girl to take the revenge of the insult you did. And I will become the reason of your destruction."
In the next life, she was born as lotus. As told by the astrologer,
the lotus was thrown in sea. The lotus through water reached the Yagaya
Mandap of King Janak's land. King Janak got this girl from land called
Jyoti. This girl was named Janaki in this birth and called Sita after
marriage.
In Sitamarhi, birth place of Goddess Sita, Janaki's birthday is
celebrated as a festival. This vrat hold lots of excitement and
enthusiasm together with faith and devotion. Janaki Navami fast is
observed by making a Mandap of four pillars. In this Mandap, idol of
Mata Sita and Lord Ram is placed. Also statues of King Janak, Mata
Sunyana, plow and Goddess earth is placed. The Puja is performed in a
manner that it looks the birthday of Janaki. Mangal Gaan is sung. Janaki
Stotra is read.