tad dharmajña maha-bhaga
bhavadbhir gauravam kulam
vrjinam narhati praptum
pujyam vandyam abhiksnasah
Translation by His Divine Grace A. C. Bhaktivedanta Swami Srila Prabhupada:
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.
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.