Matsya Purana 249.53

249.53

dadhārāmṛtamanthānaṃ mandaraṃ cārukandaram.
nārāyaṇaḥ sa bhagavān bhujayugmadvayena tu .. 249.53 ..

The Devas said — “Deva ! In order to obtain nectar to make Ourselves immortal, we all are churning this ocean, but without your assistance we are helpless We will be successful, if you lead us Hearing those words, Lord Viṣṇu followed the Devas to that spot where Mandara was floating The great mountain was then encircled by the Sêṣa and the Devas and the Asuras took hold of the string The Devas took hold of the tail end of the Seṣa and the demons, Râhu and others, took the head ends Lord Viṣṇu caught hold of the summit of Meru with His left hand and Bali held the thousand heads of Sêṣa with His left hand, and with his right hand he caught hold of his body, Sêṣa firmly coiled round the Mandarâchala, after which the Devas and the demons started to churn the ocean for a hundred Divine years —47 54