Manava Dharmashastra 2.225

2.225

anyo'pi na kaścidavamantavyaḥ, ete punarviśeṣataḥ | prāyaścittādhikyamatretyarthaḥ | ārttena taiḥ pīḍitenāpi | avamānamavajñā, prāptāyāḥ pūjāyā akaraṇaṃ nyakkāraścānādarākhyaḥ | brāhmaṇagrahaṇaṃ purūṣārtham |

The preceptor, the father, the mother and the elder brother should not be treated with disrespect, especially by a Brāhmaṇa,—even though he be distressed—(225)

Medhātithi’s commentary (manubhāṣya):
In fact no one should bo treated with disrespect; specially these. That is to say, the disrespect of these entails a heavier expiation.

‘Distressed’—injured by them.

‘Treating with disrespect’ consists in disregard; the omitting of honour due; as also insulting, which is called ‘want of respect.’

The term ‘Brāhmaṇa’ has been added only for filling up the metre.—(225)