Skandapurana 16.3.112

16.3.112

tīrthavratāni sevante pratyayo naiva jāyate ..
mohitaṃ tu jagatpūrvaṃ mithyājñānena śaṃkara .. 112 ..

They observe vows at sacred fords, yet conviction never arises. / Formerly the world was deluded by false knowledge, O Śaṃkara;