大般涅槃經義記 6.163

6.163

解明行中，先問、後釋。釋中有四，初一據果尋因以釋，明者是其菩提善果，行足是因，乘戒慧足得菩提果名明行足。戒者是福，福有無量，離惡為首，故偏舉戒。慧者是智，福智具足，故得菩提。

In explaining Vidyācaraṇasampanna, there is first an inquiry and then an explanation. In the explanation there are four: The first explains it by tracing the cause based on the fruition: knowledge (vidyā) is the wholesome fruition of bodhi, and conduct (caraṇa) is the cause; being complete in the vehicle, precepts, and wisdom to attain the fruition of bodhi is called 'perfect in knowledge and conduct'. Precepts are merit; merits are immeasurable, and departing from evil is foremost, so precepts are singled out. Wisdom is understanding; being complete in merit and wisdom, one therefore attains bodhi.