Mudgalapurana 1.3.29

1.3.29

śivahīne tathā yajñe mukhyo jāto hi keśavaḥ |
vedabāhyaṃ svayaṃ karma kurute tena śāpitaḥ ||

Since Keśava has become chief in a sacrifice bereft of Śiva, / he himself performs a rite outside the Vedas, and is therefore cursed by me!”