Brihat Parashara Hora Shastra
व्यक्ताव्यक्तात्मको विष्णुर्वासुदेवस्तु गीयते । यदव्यक्तात्मको विष्णुः शक्तितद्वयसमन्वितः ॥ १२ ॥
The Principal Evolver, who is both perceptible and imperceptible in Vasudeva. The Imperceptible part of the Lord is endowed with dual powers, while the Perceptible with triple powers.
english translation
vyaktAvyaktAtmako viSNurvAsudevastu gIyate । yadavyaktAtmako viSNuH zaktitadvayasamanvitaH ॥ 12 ॥
hk transliteration by Sanscript