大毘盧遮那成佛經疏 17.10

17.10

As for the fourth mudrā, it is like the previous third mudrā, with the two earth fingers parallel and bent together into the palm. This is the Buddha-voice adornment mudrā, and also the mudrā of adornment with myriad virtues. It is also called the adornment of the inner and outer. Just as worldly people have various chambers, garments, ritual implements, and the like, adorned with every kind of precious requisite, which is called 'replete with myriad virtues'; so too here, whether inner or outer, the Tathāgata's adornment of myriad virtues is fully present. The maṇḍala is half-moon shaped, with dots flanking and surrounding it; the rest should be contemplated as before. The mantra is: