大般涅槃經義記 5.273

5.273

就知眾中，先問，次辯，後總結之。辯中，初先知其眾別，「應於」已下知其化儀，「行來坐起」是身業化，「說法問答」是口業化。

Within "knowing the assembly," it first questions, next analyzes, and finally concludes overall. In the analysis, it first knows the differences among assemblies; from "should, toward..." downward, it knows the protocols for transforming them: "walking, coming, sitting, and rising" is transformation through bodily karma; "preaching the Dharma, questioning, and answering" is transformation through vocal karma.