Bhagavatapurana 1.18.23

1.18.23

ahaṃ hi pṛṣṭo 'ryamaṇo bhavadbhir ācakṣa ātmāvagamo 'tra yāvān /
nabhaḥ patantyātmasamaṃ patattriṇas tathā samaṃ viṣṇugatiṃ vipaścitaḥ //

23. O Brahmins like unto Suryas, I shall, as desired by you, tell you (of His glories) as far as my understanding goes; birds fly aloft in the sky to the extent of their might; similarly the wise impart knowledge of Vishnu to the extent of their capability.