The four groups of Buddhist disciples. See 四輩.

四部之衆 (sì bù zhī zhòng) 　( “the fourfold assemblies of Buddhist disciples, i.e. monks, nuns, laymen, and laywomen” ) Cf. 四輩(sì bèi) etc. ;

{not found at 《漢語大詞典》3.587.} ; {not found at 《大漢和辞典》3.38.} ;

Dharmarakṣa: {63c1} 天雨意華、大意華、柔軟音華、大柔軟音華，散世尊上及於大會四部之衆(p)

{K.5.12} catur~ parṣad~

Kumārajīva: {L.2b12} 大衆

Dharmarakṣa: {65c8}

{K.16.8} do.

Kumārajīva: {L.3c9} 四衆

Dharmarakṣa: {103c27} 四部之衆悉亦各起叉手而立(p)

{K.248.14-}

{MSS} catur~ pariṣad~

cf. Krsh.149

Kumārajīva: {L.33b25} 四衆

etc. 

A Digital Edition of A Glossary of Dharmarakṣa translation of the Lotus Sutra by Seishi Karashima, 1998