Shiva Purana

siva.sh/siva-purana/uma-samhita/20/19

संक्रातिविषुवद्योगो नादमुक्ते नियुज्यताम्।। ध्यानं त्रिकालिकं ज्योतिरुन्मनीभावधारणा ।। १९।।

sanskrit

Let the yoga of the conjunction and the equinox be engaged in the release of sound. Meditation is the threefold light and meditation is the meditation of the mind.

english translation

saMkrAtiviSuvadyogo nAdamukte niyujyatAm|| dhyAnaM trikAlikaM jyotirunmanIbhAvadhAraNA || 19||

hk transliteration by Sanscript