Bṛhadāraṇyaka Upaniṣad ("Great Forest Teaching") 4.4.23

4.4.23

tadetadṛcābhyuktam | eṣa nityo mahimā brāhmaṇasya na vardhate karmaṇā no kanīyān | tasyaiva syātpadavittaṃ viditvā na lipyate karmaṇā pāpakeneti tasmādevaṃvicchānto dānta uparatastitikṣuḥ samāhito bhūtvātmanyevātmānaṃ paśyati sarvamātmānaṃ paśyati nainaṃ pāpmā tarati sarvaṃ pāpmānaṃ tarati nainaṃ pāpmā tapati sarvaṃ pāpmānaṃ tapati vipāpo virajo'vicikitso brāhmaṇo bhavatyeṣa brahmalokaḥ samrāḍenaṃ prāpito'sīti hovāca yājñavalkyaḥ so'haṃ bhagavate videhānddāmi māṃ cāpi saha dāsyāyeti

'This has been told by a verse (Rik): "This eternal greatness of the Brâhmana does not grow larger by work, nor does it grow smaller. Let man try to find (know) its trace, for having found (known) it, he is not sullied by any evil deed."
'He therefore that knows it, after having become quiet, subdued, satisfied, patient, and collected, sees self in Self, sees all as Self. Evil does not overcome him, he overcomes all evil. Evil does not burn him, he burns all evil. Free from evil, free from spots, free from doubt, he becomes a (true) Brâhmana; this is the Brahma-world, O King,'--thus spoke Yâgñavalkya.
Ganaka Vaideha said: 'Sir, I give you the Videhas, and also myself, to be together your slaves.'