瑜伽師地論略纂 4.54

4.54

'Superior black birth' means: lineage and karma being evil is called black; because their power and influence are strong, it is called superior. Or, it is the extreme among the black, and is thus called superior black. 'Caṇḍāla' means a slaughterer. 'Pukkasa', also pronounced bupukkasa, is a household of scavengers of excrement and filth. 'Gṛhapatis of great wealth and nobility' refers to those not of the kṣatriya or other castes, but possessing superior skills, upright and respectable, which is called a gṛhapati household. 'Superior rebirth that is neither black nor white' refers to the vaiśyas and the like.