四部(sì bù) “the four groups of Buddhists, i.e. monks, nuns, laymen, and laywomen” Cf. 四部众(sì bù zhòng), 四众(sì zhòng);
HD. 3.587a(陈代); DK. 3.38c(梁书); Krsh(1998) , s.v.;
51b27.此会菩萨 五百之众 幷及四部 清信士女 今于我前 听法者是(v)
K. 384.12.bhikṣūṇa ca bhikṣuṇīca upāsikāśca͡iva; O. etc. bhikṣūṇa ca bhikṣuṇīnaca upāsakāśca͡iva; Z. 123c22.诸比丘众 及比丘尼 清信士女;