四部弟子(sì bù dì zǐ) “the four groups of Buddhist disciples, i.e. monks, nuns, laymen, and laywomen” Cf. 四辈(sì bèi) etc.;
not found at HD. 3.587.; not found at DK. 3.38.;
66a23.应时，其地六反震动。国中人民各取天华复散佛上。四部弟子、诸天、世人愕然疑怪(p)
K. 20.5.bhikṣu-bhikṣuṇy-upāsakôpāsikā-; L. 4a14.比丘、比丘尼、优婆塞、优婆夷;