Skandapurana 3.1.52.1.12

3.1.52.1.12

na dhārayaṃti ye bhasma tripuṃḍroddhūlanādinā ..
jābālopaniṣanmaṃtraissaptabhirmastakādike .. 59 ..
śivaṃ vā keśavaṃ vāpi tathānyānapi vai surān .1

and who do not wear ashes by means of the triple mark, dusting, and so forth, / with the seven mantras from the Jābāla Upaniṣad on the head and other parts, / or [who do not worship] Śiva, Keśava, or even other gods,