 Puranas are the first scriptures to speak about her birth . They declare that sage Kashyapa is her father , not Shiva as described in the Mangalkavyas . Once , when serpents and reptiles had created chaos on the earth , sage Kashyapa created goddess Manasa from his mind ( mana ) . The creator god Brahma made her the presiding deity of snakes and reptiles . Manasa gained control over the earth , by the power of mantras she chanted . Manasa then propitiated the god , Shiva , who told her to please Krishna . Upon being pleased , Krishna granted her divine Siddhi powers and ritually worshipped her , making her an established goddess . 
