Sammādiṭṭhisutta

mn9:16.1 And what is the origin of suffering?

mn9:16.2 It’s the craving that leads to future lives, mixed up with relishing and greed, taking pleasure there wherever it alights. That is,

mn9:16.3 craving for sensual pleasures, craving for continued existence, and craving for nonexistence.

mn9:16.4 This is called the origin of suffering.