The Atharvavedic hymn (AVŚ X.4 = AVP XVI. 15, 16, 17) is a charm against snakes and their poison. It mentions Paidva, a slayer of snakes. The word paidva-, literally meaning of Pedu, is derived from the word pedu- that occurs in the ṚV as a proper name (ṚV 117.9; 118.9; 119.10). In the Ṛgvedic hymns, addressed to Aśvins, it is mentioned that Aśvins gave a white horse to Pedu. The word paidva- thus refers to the horse. This horse is said to have possessed the power to destroy snakes. The Ṛgvedic hymns in question mention the snake-destroying horse; however, they have no connection with the remedy for removing snake’s poison. On the contrary, the Atharvavedic hymn (AVŚ X.4) does not mention Aśvins and their gift to Pedu; but mentions paidva that kills various kinds of snakes. In the ritual context of the Atharvaveda, paidva is to be employed in the remedy for removing snakes poison, prescribed in the Kauśika-sūtra (32.20-25), the major ritual text of the Atharvaveda. It is obvious that paidva, mentioned in the rite of the Kauśika-sūtra, is not the mythical horse of the Ṛgveda. The Atharvavedic tradition simply uses the connection of the mythical horse of Pedu with the snake-killing power for the purpose of the ritual in which the main rite is to be performed as the remedy for removing snake’s poison. It is difficult to identify paidva of the Atharvaveda. The commentators of the Kauśika-sūtra identify it as an insect. It appears that there existed a remedy in the tradition of the Atharvaveda for removing the snake’s poison and that the insect or some other substance to be used for that purpose was given the name paidva in order to connect it with the mythical horse known for its snake-killing power. The relevant myth and the ritual connected with the myth will be discussed in detail.