Now, on hearing his father's death by Takshaka, Parikshit's son Janamejaya vowed to kill Takshaka within a week. He starts the Sarpasatra, a yagna, which forced each and every snake of the entire universe to fall in the havan kund. However, Indra tries to save Takshaka from getting pulled in sacrifice. The sages who perform sacrifice start chanting Indraay swaahaa, Takshakaay cha swaahaa. Due to this even Indra starts getting pulled in the sacrifice. Later, this yagna / sacrifice was stopped from doing so by Astika Muni, (who is the son of Mansa Devi). Thus, Takshaka was spared and Janamejaya stops his Sarpasatra. That day was Shukla Paksha Panchami in the month of Shravan and is since celebrated as the festival of Naga Panchami.