觀無量壽佛經義疏 2.52

2.52

「『二者受持三歸、具足眾戒不犯威儀。』」就中三句，上句即翻邪三歸。凡夫無始繫屬於魔，作法歸投希求救護。若但受歸，有善無戒，若受眾戒必兼三歸。下二句即受戒法。在家五八、出家十具，故云眾戒。受持無缺，故云具足。威儀亦戒，輕細難持，人多陵犯，故特標簡。

"'Second, receiving and holding the three refuges, fulfilling the manifold precepts, and not violating the deportments.'" Therein are three phrases. The upper phrase is taking the three refuges that overturn error. Ordinary beings from beginningless time have been bound to māras; by performing the rite they take refuge, hoping for rescue and protection. If one only receives the refuges, there is virtue but no precepts; if one receives the manifold precepts, they necessarily encompass the three refuges. The lower two phrases are the method of receiving precepts. For laypeople, the five and eight precepts; for monastics, the ten and complete precepts; hence they are called "manifold precepts". Receiving and keeping them without defect, they are therefore said to be "fulfilled". Deportment is also precepts; being subtle and difficult to maintain, people frequently infringe upon it, hence it is specifically distinguished.