《中部》第八十二经，记述 Raṭṭhapāla 出家的因缘，以及他后来向拘楼国王阐述促使他舍弃优渥生活的四项真理——世间无常流转、无所依怙、一切终将舍离、贪爱使人永不知足。

The eighty-second discourse of the Majjhima Nikāya, recounting Raṭṭhapāla’s ordination and his later explanation to a Kuru king of the four truths that led him to renounce a life of privilege — that the world is in constant flux, without a protector, that nothing can be kept, and that craving leaves it forever unsatisfied.