大乘義章 11.84

11.84

次辨成處。隨身不失，名為成處。依如《毘曇》，四無量心性是有漏，在下成上，生上失下。以是義故，依於初禪，未來中間所修無量但未退失，大梵已還隨身何處皆得成就，生上界失。依二禪者，二禪已還一切處成。乃至依於四禪起者，四禪已還一切處成，生上即失。成實法中，有漏生上不失於下，上得寄起下地法故。以是義故，依一切禪所修無量但未退失，於三界中隨身何處皆得成就。故彼《成實．無量品》云「於一切處有一切矣。」大乘亦爾，菩薩所修，隨身何處常成就故。

Next is the analysis of the locus of accomplishment. That which is unlost according to one's body is called the locus of accomplishment. According to the Abhidharma, the four immeasurables are by nature sāsrava; being below, one accomplishes the above, and being born above, one loses the below. For this reason, relying on the preparatory and intermediate dhyānas of the first dhyāna, the immeasurables cultivated—provided they are not lost through regression—are accomplished wherever one's body may be, from the Great Brahmā [heaven] downwards; upon rebirth into the realms above, they are lost. For those relying on the second dhyāna, they are accomplished in all places from the second dhyāna downwards. Up to those arising in reliance on the fourth dhyāna: they are accomplished in all places from the fourth dhyāna downwards, and upon rebirth above they are lost. In the system of the Tattvasiddhi, when one with sāsrava is born above, one does not lose the lower realms, because the dharmas of lower stages can be temporarily aroused in higher ones. For this reason, the immeasurables cultivated in reliance on all dhyānas—provided they are not lost through regression—are accomplished wherever one's body may be within the three realms. Thus the "Chapter on the Immeasurables" of the Tattvasiddhi says: "In all places there is everything." The Mahāyāna is also like this, because what the bodhisattva cultivates is constantly accomplished wherever their body may be.