佛說佛名經 30.87

30.87

「眾等相以，即今我身心寂靜無諂無障，正是生善滅惡之時，復應各起四種觀行，以為滅罪作前方便。何等為四？一者、觀於因緣；二者、觀於果報；三者、觀於自身；四者、觀如來身。

"All of you together: at this very moment, our bodies and minds are tranquil, without flattery and without hindrance, which is precisely the time to generate good and eliminate evil. Furthermore, each of you should generate four kinds of contemplative practice to serve as preliminary skillful means for extinguishing offences. What are the four? First, contemplating causes and conditions; second, contemplating karmic retributions; third, contemplating one's own body; fourth, contemplating the body of the Tathāgata.