四分律行事鈔資持記 1.548

1.548

結場中。相及羯磨，皆云小界者；對外大界，在中名小；與下三小，名同相別。

In binding the platform: The landmarks and the karmavācanā both refer to it as a “small boundary”; in contrast to the outer great boundary, being in the middle it is called small; its name is the same as the three small [boundaries] below, but its characteristics are different.