When King Janamejaya did not see Takṣaka entering his sacrificial fire, he said to the brāhmaṇas : Why is not Takṣaka, the lowest of all serpents, burning in this fire?
Srimad Bhagavata Purana
श्रीमद्भागवतमहापुराणम्
मूल श्लोकः
अपश्यंस्तक्षकं तत्र राजा पारीक्षितो द्विजान् । उवाच तक्षकः कस्मान्न दह्येतोरगाधमः
apaśyaṃstakṣakaṃ tatra rājā pārīkṣito dvijān | uvāca takṣakaḥ kasmānna dahyetoragādhamaḥ
SB 12.6.18