 Manasā , also Mansa Devi , is a Hindu folk goddess of snakes , worshipped mainly in Bengal and other parts of North and northeastern India , chiefly for the prevention and cure of snakebite and also for fertility and prosperity . Manasa is the sister of Vasuki , king of Nāgas ( snakes ) and wife of sage Jagatkāru ( Jaratkāru ) . She is also known as Vishahara ( the destroyer of poison ) , Nityā ( eternal ) and Padmavati . 
