Example Sentences:

Ramayana:  If we accuse Vibhishana of perfidy to Ravana, we fail to understand that Vibhishana considered loyalty to the race of demons more important than the current king of demons.

Mahabharata:  On learning how Bhima’s life had been endangered by Duryodhana’s perfidy, the Pandavas felt alarmed and angered.

Bhagavad-gita:  As long as we lack inner purity, we are prone to be deluded and degraded by our mind’s perfidy.