SB 12.6.19
tam gopayati rajendra
sakrah saranam agatam
tena samstambhitah sarpas
tasman nagnau pataty asau
Translation:
The brahmanas replied: O best of kings, the snake Taksaka has not fallen into the fire because he is being protected by Indra, whom he has approached for shelter. Indra is holding him back from the fire.