觀無量壽佛經疏 1.12

1.12

五、料簡定散兩門，即有其六：一明能請者即是韋提。二明所請者即是世尊。三明能說者即是如來。四明所說即是定散二善十六觀門。五明能為即是如來。六明所為即韋提等是也。

Fifth, analyzing the two gates of meditative and non-meditative [good], there are six aspects: first, clarifying the petitioner, namely Vaidehī; second, clarifying the one requested, namely the World-Honoured One; third, clarifying the speaker, namely the Tathāgata; fourth, clarifying what was spoken, namely the sixteen contemplation gates of the two goods, meditative and non-meditative; fifth, clarifying the one who acted [for their sake], namely the Tathāgata; sixth, clarifying those for whom it was acted, namely Vaidehī and others.