The Great Epic of the Bhārata dynasty 6.33.48

6.33.48

na vedayajñādhyayanairna dānairna ca kriyābhirna tapobhirugraiḥ |
evaṃrūpaḥ śakya ahaṃ nṛloke draṣṭuṃ tvadanyena kurupravīra || 48 ||

"The Holy One said, 'Pleased with thee, O Arjuna, I have, by my (own) mystic power, shown thee this supreme form, full of glory, Universal, Infinite, Primeval, which hath been seen before by none save thee. Except by thee alone, hero of Kuru's race, I cannot be seen in this form in the world of men by any one else, (aided) even by the study of the Vedas and of sacrifices, by gifts, by actions, (or) by the severest austerities. Let no fear be thine, nor perplexity of mind at seeing this awful form of mine. Freed from fear with a joyful heart, thou again see Me assuming that other form.'"