Madhava, by his prowess, hurled into the bosomn of the sea, the fortress of the Danavas known as Soubha, situated in heaven, protected by Shalva and considered to be invulnerable.
सौभं दैत्यपुरं खस्थं शाल्वगुप्तं दुरासदम्। समुद्रकुक्षौ विक्रम्य पातयामास माधवः॥