一切經音義 25.29

25.29

震動（雙林召集皆有異相初則聲相隨其類音也次有光相面門所出也此則第三動地相也若唯聲無光聾者不聞唯光無聲盲者不見故須動地普召有緣如來密意）。

'Shaking and quaking' (The gathering at the Twin Trees had unusual signs: first there was the sign of sound, matching their respective sounds; next there was the sign of light, emitted from the portal of the face; this was the third sign, the quaking of the earth. If there were only sound without light, the deaf would not hear; if only light without sound, the blind would not see. Therefore, the earth had to quake to summon universally those with karmic conditions; such is the Tathāgata's esoteric intent).