Vishwarupa (विश्वरूप) or Viratarupa (विराटरूप), refers to the form associated with Lord Vishnu, a form with numerous heads, faces, eyes and legs. The form include various Hindu deities like Shiva, Brahma and all the sages.
Eleventh Chapter of Bhagavata Gita is called as “Vishwarupa Darshan Yoga”, Krishna once showed Vishwarupa form to Yashoda in his childhood and than to Arjuna in the ‘battlefield.
Vishwarupa in Bhagavata Gita
Vishwarupa form was first described by Sanjaya in the Bhagavata Gita Verse 10-12
अनेकदिव्याभरणं दिव्यानेकोद्यतायुधम् || 10 ||
दिव्यमाल्याम्बरधरं दिव्यगन्धानुलेपनम् |
सर्वाश्चर्यमयं देवमनन्तं विश्वतोमुखम् || 11 ||
(Vishwarupa has a form) With numerous mouths and eyes, with numerous wonderful sights, with numerous divine ornaments, with numerous divine weapons held in hands. Wearing divine garlands and apparel, covered with divine unguents, the all-wonderful, endless with faces on all sides
दिवि सूर्यसहस्रस्य भवेद्युगपदुत्थिता |
यदि भा: सदृशी सा स्याद्भासस्तस्य महात्मन:
Brightness of thousand suns together in the sky, they would not match the splendor of that great form (Vishwarupa form)
Arjuna than describe Vishwarupa in Bhagavata Gita Verse 15 -17
पश्यामि देवांस्तव देव देहे
सर्वांस्तथा भूतविशेषसङ्घान् |
मृषींश्च सर्वानुरगांश्च दिव्यान् || 15||
Arjun said: O Shree Krishna, In your body I see all the gods, celestial beings , Lord Brahma who is seated on the lotus, Lord Shiva ,all the sages and the celestial serpents.
पश्यामि त्वां सर्वतोऽनन्तरूपम् |
नान्तं न मध्यं न पुनस्तवादिं
पश्यामि विश्वेश्वर विश्वरूप || 16
I see you in endless forms with countless arms, stomachs, faces and eyes. O Lord, I do not see in you with beginning, middle or end.
किरीटिनं गदिनं चक्रिणं च
तेजोराशिं सर्वतो दीप्तिमन्तम् |
पश्यामि त्वां दुर्निरीक्ष्यं समन्ताद्
दीप्तानलार्कद्युतिमप्रमेयम् || 17||
I see you with the diadem, the club and the discus, a mass of radiance shining everywhere, very hard to look at, blazing all round like burning fire and the sun, and immeasurable.
Vishwarupa in Purusha Suktam
Purusha Suktam also explain the Vishwarupa form in the first verse :
ॐ स॒हस्र॑शीर्षा॒ पुरु॑षः । स॒ह॒स्रा॒क्षः स॒हस्र॑पात् ।
स भूमिं॑ वि॒श्वतो॑ वृ॒त्वा । अत्य॑तिष्ठद्दशाङ्गु॒लम् । 1 ।
That ultimate being has thousand heads, thousand eyes and thousand legs. He covers this whole universe, yet he is above from the same by margin of 10 fingers.