Srimad Bhagvata Mahapurana: Book 10: Chapter 34: Verses 27-32
Beholding Their own womenfolk crying "O Krsna ! 0 Balarama !" even like cows seized by a robber, the two Brothers ran in pursuit. Shouting Their assurance of safety in the words "Do not be afraid !" with a sal tree in hand, the two nimble-footed Brothers ran with quick steps and speedily overtook that vile Guhyaka (Yaksa). Shuddering to perceive the two Brothers, close upon his heels like Kala (the Time-Spirit) and Death personified, the fool abandoned the womenfolk and ran post-haste with intent to save his life. Intending to snatch the jewel on his head, Sri Krsna (the Protector of cows) chased him whithersoever he ran; while Bala stood guard over the women. Approaching him as though he were not very far off, the almighty Lord severed the head of that evil-minded fellow, including the jewel on his crest with a (stroke of) His fist, 0 dear Pariksit ! Having thus slain Sankhacuda and taking his splendid gem, He lovingly presented it to His elder brother in the presence of the women, who stood looking on (with wonder).
Thus ends the thirty-fourth discourse entitled "The Lord slays Sankhacuda ",in the first half of Book Ten of the great and glorious Bhagavata-Purana, otherwise known as the Paramahamsa-Samhita.