The Aggi-Vacchagotta Sutta is a Buddhist sutta in the Majjhima Nikaya of the Tripitaka. In this sutta, Gautama Buddha clarifies his views on the nature of existence and explains the nature of nirvana to Vacchagotta by means of a simile. Nirvana is compared to an extinguished fire, a common theme in Buddhist thought.
Read more about Aggi-Vacchagotta Sutta: The Thicket of Views, Nirvana, Dabba Sutta