坐禪三昧經 2.39

2.39

是人多增進，一心極厭世界行，欲了了四諦相，作證趣涅槃，如是一心中，是名世間第一法。一時住四行：無常、苦、空、無我，觀一諦，苦法忍共緣故。何以故？觀欲界五受陰，無常、苦、空、無我，是中心忍入慧，亦是相應心心數法，是名苦法忍。身業、口業及心不相應諸行，現在未來世一切無漏法初門，是名苦法忍（法無漏法忍信受也）。

When this person advances greatly, single-mindedly and utterly revulsed by worldly activities, wishing to clearly realize the marks of the four truths and realize them to proceed toward nirvāṇa—within such a single mind, this is named the supreme worldly dharmas (laukikāgradharma). At one time he abides in four aspects: impermanence, suffering, emptiness, and non-self, contemplating one truth, because it shares the same condition as the acceptance of the dharma of suffering (duḥkhe dharma-jñāna-kṣānti). Why? He contemplates the five appropriated aggregates of the desire realm as impermanent, suffering, empty, and non-self. Within this, the mental acceptance entering wisdom, as well as the associated mind and mental factors, is named the acceptance of the dharma of suffering. Bodily action, vocal action, and formations non-associated with mind—the initial gateway to all untainted dharmas of the present and future lives—are named the acceptance of the dharma of suffering (the dharma is the untainted dharma; acceptance is faithful reception).