大毘盧遮那經廣大儀軌 1.113

1.113

By the power of the mantra and mudrā, imagine placing the seal on five places:
the forehead, left and right [shoulders], heart, and throat; with samādhi light over the whole body,
heavenly māras cannot destroy it.
Next, form the mudrā of dharmadhātu-origination: visualize the syllable RA in white,
adorned with a void dot (anusvāra), like a bright gem in a topknot,
placed atop the crown of the head. Even if accumulated sinful defilements
from hundreds of kalpas exist, through this they are entirely eradicated.
With the samādhi and prajñā wind [wheels] rounded, the mudrā is identical to dharmadhātu-origination.