Shiva Purana

siva.sh/siva-purana/rudra-samhita/30/32

रुद्रं जानासि दुर्बुद्धे स्वसुतं परमेश्वरम् ।। वेदवक्तापि विज्ञानं विस्मृतं तेखिलं विधे ।। ३२ ।।

sanskrit

You foolishly think of Rudra, the great lord as your son. O Brahman, though the reciter of the Vedas you have forgotten all true knowledge.

english translation

rudraM jAnAsi durbuddhe svasutaM paramezvaram || vedavaktApi vijJAnaM vismRtaM tekhilaM vidhe || 32 ||

hk transliteration by Sanscript