Shiva Purana
निराकारात्मसंवित्तिर्ध्यानं निर्विषयं मतम् ॥ निर्बीजं च सबीजं च तदेव ध्यानमुच्यते ॥ ८ ॥
Consciousness of the formless Self is considered to be free from objects. That which is seedless and seedless is called meditation.
english translation
nirAkArAtmasaMvittirdhyAnaM nirviSayaM matam ॥ nirbIjaM ca sabIjaM ca tadeva dhyAnamucyate ॥ 8 ॥
hk transliteration by Sanscript