因明入正理論疏 2.125

2.125

述曰：初一句宗，次一句因，次一句敵，後一句結。如勝論師對經部立虛空實有宗，德所依因。凡法、有法必須極成，不更須成，宗方可立。況諸因者皆是有法宗之法性，標空實有，有法已不成，更復說因，因依於何立？故對無空論，因所依不成。

Commentary: The first clause is the pratijñā, the next clause the hetu, the next clause the opponent, and the final clause concludes [the fallacy]. For example, when a Vaiśeṣika proves to a Sautrāntika the pratijñā "Space is a real entity" with the hetu "because it is the substratum of qualities." Any property (dharma) or subject (dharmin) must be mutually established and need no further proof for the pratijñā to be established. How much more so for all reasons, which are the property-nature of the subject in the pratijñā! By designating space as a real entity, the subject is already unestablished; when one further states the reason, upon what does the reason stand? Therefore, against those who maintain that space is non-existent, the reason's substratum is unestablished (āśrayāsiddha).