SB 1.7.46

tad dharmajña mahā-bhāga
 bhavadbhir gauravaṁ kulam
vṛjinaṁ nārhati prāptuṁ
 pūjyaṁ vandyam abhīkṣṇaśaḥ
Synonyms: 
tat — therefore; dharma-jña — one who is aware of the principles of religion; mahā-bhāga — the most fortunate; bhavadbhiḥ — by your good self; gauravam — glorified; kulam — the family; vṛjinam — that which is painful; na — not; arhati — does deserve; prāptum — for obtaining; pūjyam — the worshipable; vandyam — respectable; abhīkṣṇaśaḥ — constantly.
Translation: 
O most fortunate one who know the principles of religion, it is not good for you to cause grief to glorious family members who are always respectable and worshipful.
Purport: 

A slight insult for a respectable family is sufficient to invoke grief. Therefore, a cultured man should always be careful in dealing with worshipful family members.