Bhagavad Gita 11.52
श्री भगवानुवाच। सुदुर्दर्शमिदं रूपं दृष्टवानसि यन्मम। देवा अप्यस्य रूपस्य नित्यं दर्शनकाङ्क्षिणः।।11.52।।
śrī bhagavānuvāca| sudurdarśamidaṃ rūpaṃ dṛṣṭavānasi yanmama| devā apyasya rūpasya nityaṃ darśanakāṅkṣiṇaḥ||11.52||
shri bhagavanuvaca sudurdarshamidam rupam drishtavanasi yanmama deva apyasya rupasya nityam darshanakankshinah11.52
Meaning
Krishna declares: This form of Mine that you have seen is very difficult to behold. Even the gods are always longing to see this form.
श्रीभगवान् बोले — मेरा यह रूप, जिसे तुमने देखा है, अति दुर्लभ है। देवता भी सदा इसके दर्शन की अभिलाषा रखते हैं।
This is verse 52 of 55 in Chapter 11 (Vishwaroopa Darshana Yoga) of the Bhagavad Gita.