Example sentences:

Ramayana: Drawing attention to the fact that all other animals were keeping a distance from the extraordinarily beautiful deer, Lakshmana inferred that it was a part of the dupery of the demons. 

Mahabharata: When Dhritarashtra proposed to the Pandavas to go to Varnavarta to enjoy the festival there, Yudhisthira sensed some dupery; if the festival was so enjoyable, why did Dhritarashtra not want his own sons to go there?

Bhagavad-gita: Sensual pleasures allure us through dupery because they appear to be like nectar and turn out to be like poison.