Bhagavad Gita 2.46

यावानर्थ उदपाने सर्वतः संप्लुतोदके।तावान्सर्वेषु वेदेषु ब्राह्मणस्य विजानतः ॥२.४६॥

yāvānartha udapāne sarvataḥ saṃplutodaketāvānsarveṣu vedeṣu brāhmaṇasya vijānataḥ

To the Brahmana who has known the Self, all the Vedas are of as much use as a reservoir of water would be in a place where there is a flood.

गीता