Svarbhanu, an asura, disguised himself as a deva in order to partake of the amrita. Surya (the sun-god) and Chandra (the moon-god) alerted Vishnu of this deception.
In this mythological narrative, Svarbhanu, an asura, used cunning to disguise himself as a deva in order to gain access to the ambrosia. However, his plan was ultimately foiled when Surya (the solar deity) and Chandra (the lunar deity) alerted Vishnu.