iti siva-sastriyatvac ca natra vaisnava-siddhanta-
viruddhasya tasyopayogah. Yata uktam skanda eva sanmukham prati sri -
sivena

siva sastre 'pi tad graahyana
bhagavat Sastra yogi yat iti

Statements in the Saivite Puranas should not be accepted unless they are
corroborated by the Vaisnava Puranas. This is confirmed in the Saivite Puranas
(Skanda Purana) where Lord Siva says to Karttikeya:

"Statements in the Saivite Puranas should be accepted only if they are
confirmed in the Vaisnava Puranas."

The followers of Lord Siva may try to present a different conclusion, but
they are simply contradicting the words of their own master, recorded in their
own scripture. From this statement of Lord Siva we may understand that the
Saivite Puranas are not a very reliable source of spiritual information. They
are not actually able to purify the conditioned souls, and their position is
described in the following statement of Srimad-Bhagavatam (1.8.52):

"It is not possible to filter muddy water through mud or purify a
wine-stained pot with wine."

On should not therefore rely on the impure statements of the Saivite
Puranas.

(Krishna sandarbha, Anuccheda 28.69)

padmottara-khande ca siva-pratipadakanam purananam api tamasatvam eva
darsitam. matsye 'pi tamasa-kalpa-kathamayatvam iti.

The inferiority of the Saivite Puranas is confirmed in the Uttara Khanda of
the Padma Purana, which explains that the Saivite Puranas are intended for
those in the mode of ignorance. The Matsya Purana also confirms that the
Saivite Puranas are full of faulty and ignorant conclusions.

(Krishna sandarbha, Anuccheda 28.70)