Shiva Purana
यं विदुर्व्वेदतत्त्वज्ञा योगिनो यतमानसाः ॥ अरूपो रूपवान्भूत्वा सोऽयमायाति सर्वगः ॥ १४ ॥
Here he comes, the all-pervasive who is without form but has assumed a form (now) and whom only the Yogins of restrained mind, the knowers of the principles of the Vedas, understand.
english translation
yaM vidurvvedatattvajJA yogino yatamAnasAH ॥ arUpo rUpavAnbhUtvA so'yamAyAti sarvagaH ॥ 14 ॥
hk transliteration by Sanscript