大日經持誦次第儀軌 1.121

1.121

ha因haṃ大悲風額，除障智風能開發故。如風能淨除塵、霧、煙、雲；如是，大智風淨除無明垢穢、煩惱、昏沈等也。

Ha, cause, haṃ: the forehead of great compassion wind; because the wisdom wind that removes obstacles can uncover and open. Just as wind can clear away dust, fog, smoke, and clouds; in this way, the great wisdom wind clears away the defilements of ignorance, afflictions, torpor, and the like.