SB 5.1.20

śrī-śuka uvāca
iti samabhihito mahā-bhāgavato bhagavatas tri-bhuvana-guror anuśāsanam ātmano laghutayāvanata-śirodharo bāḍham iti sabahu-mānam uvāha.
Synonyms: 
śrī-śukaḥ uvāca — Śrī Śukadeva Gosvāmī said; iti — thus; samabhihitaḥ — completely instructed; mahā-bhāgavataḥ — the great devotee; bhagavataḥ — of the most powerful Lord Brahmā; tri-bhuvana — of the three worlds; guroḥ — the spiritual master; anuśāsanam — the order; ātmanaḥ — of himself; laghutayā — because of inferiority; avanata — bowed down; śirodharaḥ — his head; bāḍham — yes, sir; iti — thus; sa-bahu-mānam — with great respect; uvāha — carried out.
Translation: 
Śrī Śukadeva Gosvāmī continued: After thus being fully instructed by Lord Brahmā, who is the spiritual master of the three worlds, Priyavrata, his own position being inferior, offered obeisances, accepted the order and carried it out with great respect.
Purport: 

Śrī Priyavrata was the grandson of Lord Brahmā. Therefore according to social etiquette, his position was inferior. It is the duty of the inferior to carry out the order of the superior with great respect. Priyavrata therefore immediately said, “Yes, sir. I shall carry out your order.” Priyavrata is described as a mahā-bhāgavata, a great devotee. The duty of a great devotee is to carry out the order of the spiritual master, or the spiritual master of the spiritual master in the paramparā system. As described in Bhagavad-gītā (4.2), evaṁ paramparā prāptam: one has to receive the instructions of the Supreme Lord through the disciplic chain of spiritual masters. A devotee of the Lord always considers himself a servant of the servant of the servant of the Lord.