大毘盧遮那經廣大儀軌 2.187

2.187

次左蓮華中，觀吒嚕𤙖（三合）字門，
字現廣生頂，印與五峯同，
能摧碎諸障。

Next, in the lotus on the left, visualise the syllable trūṃ gate,
The syllable manifesting Mahodgatoṣṇīṣa; the mudrā is identical to the five peaks,
Able to crush all obstacles.