Mbh 1.18.10

“And at length rose the great elephant, Airavata, of huge body and with two pair of white tusks. And him took Indra the wielder of the thunderbolt. But with the churning still going on, the poison Kalakuta appeared at last. Engulfing the Earth it suddenly blazed up like a fire attended with fumes. And by the scent of the fearful Kalakuta, the three worlds were stupefied. And then Siva, being solicited by Brahman, swallowed that poison for the safety of the creation. The divine Maheswara held it in his throat, and it is said that from that time he is called Nilakantha (blue-throated). Seeing all these wondrous things, the Asuras were filled with despair, and got themselves prepared for entering into hostilities with the gods for the possession of Lakshmi and Amrita. Thereupon Narayana called his bewitching Maya (illusive power) to his aid, and assuming the form of an enticing female, coquetted with the Danavas. The Danavas and the Daityas charmed with her exquisite beauty and grace lost their reason and unanimously placed the Amrita in the hands of that fair damsel.’”