Samyutta Nikaya
According to the Buddhist tradition, the first talk of Gautama Buddha after he attained enlightenment is recorded in the "Dhammacakkappavattana Sutta" ("Setting in Motion the Wheel of Dhamma", Samyutta Nikaya 56.11). The "Dhammacakkappavattana Sutta" provides details on three stages in the understanding of each truth, for a total of twelve insights. The three stages for understanding each truth are: