The Long Āgama Sūtra 8.31

8.31

佛言：「彼苦行者，不自計念：『我行如是，當得供養恭敬禮事。』是為苦行無垢法也。彼苦行者，得供養已，心不貪著，曉了遠離，知出要法，是為苦行無垢法也。彼苦行者，禪有常法，有人、無人，不以為異，是為苦行無垢法也；彼苦行者，聞他正義，歡喜印可，是為苦行無垢法也；彼苦行者，他有正問，歡喜解說，是為苦行離垢法也。

The Buddha said, “Those ascetic practitioners don’t think to themselves, ‘Practicing in this way, I’ll obtain offerings, respect, and veneration.’ This is an ascetic practice that’s undefiled.

“Once those ascetic practitioners obtain offerings, their minds aren’t attached to desire for them. They understand how to distance themselves from it and know how to escape it. This is an ascetic practice that’s undefiled.

“Those ascetic practitioners are always meditating whether people are present or not. It makes no difference to them. This is an ascetic practice that’s undefiled.

“Those ascetic practitioners hear correct doctrines from others, and they are happy to accept them. This is an ascetic practice that’s undefiled.

“When those ascetic practitioners are asked correct questions, they are happy to give explanations. This is an ascetic practice that’s undefiled.