Shiva Purana

siva.sh/siva-purana/saturda-samhita/9/14

यं विदुर्व्वेदतत्त्वज्ञा योगिनो यतमानसाः ।। अरूपो रूपवान्भूत्वा सोऽयमायाति सर्वगः ।। १४ ।।

sanskrit

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