瑜伽論記 17.513

17.513

測、光等云：以約聖人說不動不退，若約異生，雖是利根而有退者，是故天授雖是利根而有退者，是故天授雖不動性而有退定，或有壽盡至退沒下生者，如生梵天，有不動業牽引本識名言種子，二十劫中功能增長假合命根，二十劫滿名為壽盡，能引業勢亦盡，名為業盡。又有感彼宮殿衣服等業名福，二十劫滿即名福盡，由三種盡退生欲界。

Ce, Guang, and others say: 'Immovability and non-retrogression are stated in terms of noble persons. If stated in terms of ordinary beings, even those of sharp faculties may retrogress. Therefore, although Devadatta was of sharp faculties, he retrogressed. Thus, although Devadatta was of an immovable nature, he retrogressed from meditative absorption. Or, there are those who retrogress and pass away to take a lower rebirth upon the exhaustion of their life span—as in the case of being born in the Brahmā world, where immovable karma drags the conventional seed of the fundamental consciousness, its functionality increasing for twenty kalpas to falsely compose a life-faculty; when the twenty kalpas are completed it is called the exhaustion of the life span, and the momentum of the karma capable of projecting it is also exhausted, which is called the exhaustion of karma. Furthermore, there is the karma that brings about those palaces, garments, and so forth, called merit; when the twenty kalpas are completed it is called the exhaustion of merit. Due to these three kinds of exhaustion, one retrogresses to be born in the desire realm.'