大方廣佛華嚴經隨疏演義鈔 1.9

1.9

五「其唯法界歟」者，結法所屬，屬法界也。謂具上諸德，獨在於法界矣。

Fifth, as for "could it be anything other than the dharmadhātu?": this concludes by identifying that to which the dharma pertains, namely, the dharmadhātu. It means that possessing all the above virtues resides exclusively in the dharmadhātu.