大方廣佛華嚴經隨疏演義鈔 21.22

21.22

疏「復有一行是如來行」，即《涅槃》第十一，至下當引。

Regarding the Commentary's stating that "there is further one practice which is the practice of the Tathāgata," this is from the eleventh fascicle of the Nirvāṇa [Sūtra], which will be cited below.