Skandapurana 14.36.189

14.36.189

agniṣṭomādikāḥ sarvāḥ kriyā naṣṭā dharātale ..
dharmakriyāstathā cānyā muktvā devyāḥ prapūjanam .. 189 ..

All rituals such as the Agniṣṭoma perished on the face of the earth,
as did other religious rites, except for the worship of the goddess.