Bhagavad Gita Chapter 11.52
śrī-bhagavān uvāca
su-durdarśam idaḿ rūpaḿ
dṛṣṭavān asi yan mama
devā apy asya rūpasya
nityaḿ darśana-kāńkṣiṇaḥ
Translation
The Supreme Personality of Godhead said: My dear Arjuna, this form of Mine you are nowseeing is very difficult to behold. Even the demigods are ever seeking the opportunity to see this form, which is so dear.