瑜伽師地論略纂 4.54

4.54

「黑勝生」者，種性業惡，名黑；威勢強故，名勝。或黑中之極，故名黑勝。　「旃荼羅」者，屠兒也。　「卜羯娑」者，亦云補羯娑，除糞穢家也。　「若諸長者大富貴家」者，非剎帝利等種，有勝伎能，敦直可重，名長者家。　「非黑非白勝生」者，即吠舍等。

'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.