sarpa-satre - in the snake sacrifice; samiddha - blazing; agnau - in the fire; dahyamānān - being burned; mahā-uragān - the great serpents; dṛṣṭvā - seeing; indram - to Indra; bhaya - with fear; saṁvignaḥ - very disturbed; takṣakaḥ - Takṣaka; śaraṇam - for shelter; yayau - went.

When Takṣaka saw even the most powerful serpents being burned in the blazing fire of that snake sacrifice, he was overwhelmed with fear and approached Lord Indra for shelter.