SAMAÑÑAPHALASUTTA
The Fruits of the Ascetic Life
The newly crowned King Ajātasattu is disturbed by the violent means by which he achieved the crown. He visits the Buddha to find peace of mind, and asks him about the benefits of spiritual practice. This is one of the greatest literary and spiritual texts of early Buddhism.
Translations
KŪṬADANTASUTTA
With Kūṭadanta
A brahmin wishes to undertake a great sacrifice, and asks for the Buddha's advice. The Buddha tells a legend of the past, in which a king is persuaded to give up violent sacrifice, and instead to devote his resources to supporting the needy citizens of his realm. However, even such a beneficial and non-violent sacrifice pales in comparison to the spiritual sacrifice of giving up attachments.
Translations
MAHĀSĪHANĀDASUTTA
The Longer Discourse on the Lion's Roar
The Buddha is challenged by a naked ascetic on the topic of spiritual austerities. He points out that it is quite possible to perform all kinds of austere practices without having any inner purity of mind.