大方廣圓覺修多羅了義經 1.110

1.110

「善男子！一切眾生，若佛住世，若佛滅後、若法末時，有諸眾生具大乘性，信佛祕密大圓覺心，欲修行者，若在伽藍安處徒眾，有緣事故隨分思察，如我已說；若復無有他事因緣，即建道場當立期限，若立長期百二十日，中期百日，下期八十日，安置淨居。若佛現在，當正思惟；若佛滅後，施設形像，心存目想生正憶念，還同如來常住之日。懸諸幡花經三七日，稽首十方諸佛名字，求哀懺悔；遇善境界得心輕安。過三七日，一向攝念。

"Kulaputra, if sentient beings—whether during the Buddha's presence in the world, after the Buddha's parinirvāṇa, or in the time of the decline of the Dharma—possess the nature of the Mahāyāna, believe in the Buddha's secret mind of great perfect enlightenment, and wish to practice it: if they reside in a saṅghārāma along with an assembly, let them reflect and contemplate according to their capacity whenever circumstances arise, just as I have already explained. If, furthermore, they have no other engagements or conditions, they should establish a place of practice and set a time limit. If they set a long period, it is one hundred and twenty days; a medium period is one hundred days; a short period is eighty days; thus establishing a pure dwelling. If the Buddha is present, they should contemplate correctly. If after the Buddha's parinirvāṇa, they should set up his image, keeping it in mind and visually contemplating it, generating correct mindfulness, just as in the days when the Tathāgata constantly abided. Hanging banners and flowers for three times seven days, they should bow down before the names of the Buddhas of the ten directions, entreating them with sorrow and repenting. When they encounter auspicious realms, they will attain mental lightness and peace. When the three times seven days have passed, they should focus exclusively on collecting their thoughts.