|Chapter 11, Verse 6|

पश्यादित्यान्वसून्रुद्रानश्िवनौ मरुतस्तथा।

बहून्यदृष्टपूर्वाणि पश्याऽश्चर्याणि भारत।।11.6।।

ॐ

Transliteration / Meaning

paśhyādityān vasūn rudrān aśhvinau marutas tathā
bahūny adṛiṣhṭa-pūrvāṇi paśhyāśhcharyāṇi bhārata

Translation

O best of the Bharatas, see here the different manifestations of Adityas, Vasus, Rudras, Asvini-kumaras and all the other demigods. Behold the many wonderful things which no one has ever seen or heard of before.

Purport by Srila Prabhupada

Even though Arjuna was a personal friend of Krishna and the most advanced of learned men, it was still not possible for him to know everything about Krishna. Here it is stated that humans have neither heard nor known of all these forms and manifestations. Now Krishna reveals these wonderful forms.