大毘盧遮那成佛經疏 16.26

16.26

Gaganāmala Bodhisattva is likewise surrounded by its origin, being encircled again by a wheel. Here 'origin' means self. The seal is made as a wheel (that is, a four-spoke sword wheel); in placing the wheel, it also surrounds itself. Inside the wind maṇḍala, the seal of Gaganamati Bodhisattva places a conch (śaṅkha) within the wind maṇḍala (that is, a crescent-moon maṇḍala). For Viśuddhamati Bodhisattva, paint a white lotus seal, placed within the wind maṇḍala. Next, for the seal of Caritamati Bodhisattva, place a conch within the wind-maṇḍala, and insert a blue lotus into the conch. For the seal of Sthiramati Bodhisattva, paint a flower within the wind-maṇḍala, and place a vajra atop the flower. In general, regarding these within the great maṇḍala of the Great Compassion Matrix: in the single assembly of Mañjuśrī there are four Bodhisattvas in all; whichever one Bodhisattva is taken as the lord is placed in the central maṇḍala, while the others are arrayed according to their directions in the second court, and the eight classes are placed in the third court. Furthermore, if it is the second court in the Great Compassion [Maṇḍala], supposing Avalokiteśvara is made the family lord, then the Vajra family, the Uṣṇīṣas, and so forth are all arrayed according to their directions as the second court, and next one should know that the eight classes are placed in the third court, without needing to place the Bodhisattvas of the Mañjuśrī assembly. If it is the Śākyamuni assembly, it is as stated above (inquire further); this explanation is the definitive teaching. Let this matter be inquired into further to be certain.