Bhagavad Gita 2.46 — The well and the flood

यावानर्थ उदपाने सर्वतः सम्प्लुतोदके। तावान्सर्वेषु वेदेषु ब्राह्मणस्य विजानतः ॥

yāvānartha udapāne sarvataḥ samplutodake | tāvānsarveṣu vedeṣu brāhmaṇasya vijānataḥ ||

Meaning

For one who knows the truth, the Vedas are as useful as a small well is when there is water flooding everywhere.