法界次第初門 3.43

3.43

三、內外空。內外空者，內外法空。內外法者，所謂內外十二入。十二入中無我、無我所。無內外法，是為內外空也。

Third: internal-and-external emptiness. Internal-and-external emptiness means that internal and external dharmas are empty. Internal and external dharmas are the so-called twelve internal and external āyatanas. Within the twelve āyatanas there is no self and no what belongs to self. The non-existence of internal and external dharmas—this is internal-and-external emptiness.