Ayyappan (Sastha or Dharmasastha or Manikandan) is a Hindu deity, particularly popular in the South Indian state of Kerala. Ayyapa is considered to be the union of Mohini (Vishnu) and Shiva. Although the worship of Ayyappa was more widespread earlier, his worship is now mainly confined to South India. Ayyappa is considered to be the ruler of the universe, and thus meditates alongside Vishnu and Shiva. He is considered to be the epitome of dharma, truth and righteousness and is often called upon to obliterate evil. The worship of Ayyappa has become very popular in the state of Kerala by members of all communities, in Karnataka, Tamil Nadu and Andhra Pradesh. The deity is mentioned in various scriptures and is a revered in south Indian Hindu traditions.