大般涅槃經義記 10.79

10.79

第三番中，「復有說空即是次第」舉他所立。如去牆壁，空相漸現，名為次第。「若是次」下，徵為數法。「若可數」下，徵為三世。「若三世」下，徵為無常。

In the third turn: "There are also those who say that space is sequential order" cites what the opponent posits. As when removing a wall, the mark of space gradually appears, which is called sequential order. From "If it is sequential..." onward interrogates it as a numerical dharma. From "If it can be counted..." onward interrogates it as belonging to the three periods of time. From "If it belongs to the three periods of time..." onward interrogates it as impermanent.