Manava Dharmashastra 2.210

2.210

guruyoṣitaḥ gurupatnyaḥ | savarṇāḥ samānajātīyāḥ | guruvatpratipūjyā ājñākaraṇādinā | asavarṇāstu kevalaiḥ pratyutthānābhivādanaiḥ | bahuvacanāddhādyartho'ntrāntarbhavati | tena hi priyahitādi gatyādyanukaraṇādyapyatidiśyate |

Medhātithi’s commentary (manubhāṣya):
‘The teacher’s ladies’—wives—‘belonging to the same caste’—of the same caste as the teacher,—‘should be honoured like the teacher’—by carrying out their orders and so forth.

‘Those not belonging to the same caste’ are to be honoured only ‘with rising and salutations.’ The plural number in ‘salutations’ has the sense of ‘et cetera’: hence the doing of what is agreeable and beneficial, the non-mimicking of gait, etc., also become included.—(210)