The Mantra of Light, alternatively (光明真言, pinyin: guāngmíng zhēnyán, rōmaji: kōmyō shingon; Sanskrit: prabhāsa-mantra), alternatively (毗盧遮那如來所說不空大灌頂光真言, pinyin: pílúzhēnà rúlái ruǒshuō bukōng dà guàndǐng guāng zhēnyán) is a Buddhist mantra. In both Chinese Buddhism and Japanese Buddhism, the mantra is associated with both the Buddha Vairocana as well as the Bodhisattva Amoghapāśa. The mantra also has various other names including the Mantra of the Light of Great Consecration (Ch: 大灌頂光真言), Mantra of Amoghapāśa (Unfailing Noose), Heart essence of Amoghapāśa (skt. amoghapāśahṛdaya) and Unfailing King (Amogharāja).
The mantra is found in the Amoghapāśa-kalparāja-sūtra (Chinese translation at Taisho no. 1092 and Korean Buddhist Canon no. K.287, translated by Bodhiruci) as well as in the Sutra of the Mantra of the Unfailing Rope Snare of the Buddha Vairocana's Great Baptism (不空羂索毘盧遮那佛大灌頂光真言一卷, Taisho no. 1002) and is associated with both the Buddha Vairocana and the deity Amoghapāśa (lit. "Unfailing Rope"), a form of Avalokiteshvara. It is also the mantra associated with the consecration (abhiseka) of Amoghapāśa by myriad Buddhas (hence its name as "mantra for the mudrā consecration" in the Tibetan version of the text).
