Srimad Bhagavatam Canto 10, Chapter 16, Text 38

SB 10.16.38

tad esa nathapa durapam anyais
tamo-janih krodha-vaso ’py ahisah
samsara-cakre bhramatah saririno
yad-icchatah syad vibhavah samaksah
O Lord, although this Kaliya, the king of the serpents, has taken birth in the mode of ignorance and is controlled by anger, he has achieved that which is difficult for others to achieve. Embodied souls, who are full of desires and are thus wandering in the cycle of birth and death, can have all benedictions manifested before their eyes simply by receiving the dust of Your lotus feet.
It is very rare for a conditioned soul to free himself from the contamination of illusion and thus become established in perfect consciousness of the Absolute Truth. And yet this benediction was achieved by the serpent Kaliya because the Lord personally danced upon the serpent’s hoods with His lotus feet. Although we conditioned souls may not receive the mercy of having the Lord dance on our head, we can receive the dust of the lotus feet of the Absolute through the Lord’s representative, the bona fide spiritual master, and thus go back home, back to Godhead, forever freed from the misery and ignorance of the mundane universe.
Srimad Bhagavatam Canto 10, Chapter 16, Text 37
Srimad Bhagavatam Canto 10, Chapter 16, Text 39