One verse

Srimad Bhagavatam 3.24.13

3.24.13

एतावत्येव शुश्रूषा कार्या पितरि पुत्रकै: । बाढमित्यनुमन्येत गौरवेण गुरोर्वच: ॥ १३ ॥

etavaty eva susrusa karya pitari putrakaih badham ity anumanyeta gauravena guror vacah

etavati
to this extent
eva
exactly
susrusa
service
karya
ought to be rendered
pitari
to the father
putrakaih
by the sons
badham iti
accepting, Yes, si
anumanyeta
he should obey
gauravena
with due deference
guroh
of the guru
vacah
commands.

Sons ought to render service to their father exactly to this extent. One should obey the command of his father or spiritual master with due deference, saying, Yes, sir