Shiva Purana
बुद्धिप्रवाहरूपस्य ध्यानस्यास्यावलंबनम् ॥ ध्येयमित्युच्यते सद्भिस्तच्च सांबः स्वयं शिवः ॥ १९ ॥
The object of meditation on the form of intellectual visions is Dhyeya and that is Śiva himself accompanied by Śivā.
english translation
buddhipravAharUpasya dhyAnasyAsyAvalaMbanam ॥ dhyeyamityucyate sadbhistacca sAMbaH svayaM zivaH ॥ 19 ॥
hk transliteration by Sanscript