大日經持誦次第儀軌 1.122

1.122

ra塵raṃ大悲火心，三昧慧炬所溫育故。如火能燒一切薪；如是，一切智火燒無智薪，滅妄業垢，令無遺餘，於無明暗中為大明照也。

Ra, dust, raṃ: the heart of great compassion fire; because it is nurtured and warmed by the samādhi torch of wisdom. Just as fire can burn all firewood; in this way, the fire of omniscience burns the firewood of non-wisdom and extinguishes the defilements of delusive karma leaving nothing behind, serving as a great illumination amidst the darkness of ignorance.