Bhagavatapurana 4.6.7

4.6.7

nāhaṃ na yajño na ca yūyam anye ye deha-bhājo munayaś ca tattvam /
viduḥ pramāṇaṃ bala-vīryayor vā yasyātma-tantrasya ka upāyaṃ vidhitset //

7. Neither I nor Yagna (Indra at the time) nor you nor the sages and others who have mortal bodies can understand the hidden nature and the extent of the strength and power of that self-existing god; and who could hope to (successfully) adopt the means (of propitiating him).