Srimad-Bhagavatam: Canto 11 - Chapter 1 - Verse 39

Sanskrit:

सङ्ख्यानं परमाणूनां कालेन क्रियते मया ।न तथा मे विभूतीनां सृजतोऽण्डानि कोटिश: ॥ ३९ ॥

ITRANS:

saṅkhyānaṁ paramāṇūnāṁkālena kriyate mayāna tathā me vibhūtīnāṁsṛjato ’ṇḍāni koṭiśaḥ

Translation:

Even though over a period of time I might count all the atoms of the universe, I could not count all of My opulences which I manifest within innumerable universes.

Purport:

The Lord here explains that Uddhava should not expect a complete catalog of the Lord’s opulences, since even the Lord Himself finds no limit to such opulences. According to Śrīla Jīva Gosvāmī, kālena indicates that the Supreme Personality of Godhead is within every atom and can therefore easily calculate the total number of atoms. However, although the Lord is certainly omniscient, even He Himself cannot supply a finite number for His opulences, because they are infinite.