梵網經菩薩戒本疏 6.133

6.133

四、具緣者，四緣成犯：一、在眾中，二、知歲數，三、造趣方便，四、坐已，便犯也。

Fourth, having the conditions: Four conditions constitute an offense: first, being within the assembly; second, knowing the number of [monastic] years; third, initiating the preparatory action to advance; fourth, having sat down, one then commits the offense.