SB 4.20.17

maitreya uvāca
sa itthaṁ loka-guruṇā
 viṣvaksenena viśva-jit
anuśāsita ādeśaṁ
 śirasā jagṛhe hareḥ
Word for word: 
maitreyaḥ uvāca — Maitreya said; saḥ — he; ittham — thus; loka-guruṇā — by the supreme master of all people; viṣvaksenena — by the Personality of Godhead; viśva-jit — the conqueror of the world (Mahārāja Pṛthu); anuśāsitaḥ — being ordered; ādeśam — instructions; śirasā — on the head; jagṛhe — accepted; hareḥ — of the Personality of Godhead.
Translation: 
The great saint Maitreya continued: My dear Vidura, in this way Mahārāja Pṛthu, the conqueror of the entire world, accepted the instructions of the Supreme Personality of Godhead on his head.
Purport: 

One should accept the instructions of the Supreme Personality of Godhead by bowing down at the lotus feet of the Lord. This means that anything spoken by the Personality of Godhead should be taken as it is, with great care and attention and with great respect. It is not our business to amend the words of the Supreme Personality of Godhead or make additions or alterations, as it has become a custom for many so-called scholars and svāmīs who comment on the words of Bhagavad-gītā. Here the practical example of how to accept the instruction of the Supreme Personality of Godhead is shown by Pṛthu Mahārāja. This is the way to receive knowledge through the paramparā system.