Brihadaranyaka Upanishad 4.1.7

4.1.7

yadeva te kaścidabravīttacchṛṇavāmetyabravīnme vidagdhaḥśākalyo hṛdayaṃ vai brahmeti yathā mātṛmānpitṛmānācāryavānbrūyāttathā tacchākalyo'bravīddhṛdayaṃ vai brahmetyahṛdaya-sya hi kim̐ syādityabravīttu te tasyāyatanaṃ pratiṣṭhāṃ na me'bravīdityekapādvā etatsamrāḍiti sa vai no brūhi yājñavalkya hṛdayamevāyatanamākāśaḥ pratiṣṭhā sthitirityenadupāsīta kā sthitatā yājñavalkya hṛdayameva samrāḍiti hovāca hṛdayaṃ vai samrāṭsarveṣāṃ bhūtānāmāyatanam̐ hṛdayaṃ vai samrāṭsarveṣāṃ bhūtānāṃ pratiṣṭhā hṛdaye hyeva samrāṭsarvāṇibhūtāni pratiṣṭhitāni bhavanti hṛdayaṃ vai samrāṭparamaṃ brahma nainam̐ hṛdayaṃ jahāti sarvāṇyenaṃ bhūtānyabhikṣaranti devo bhūtvā devānapyeti ya evaṃ vidvānetadupāste hastyṛṣabham̐ sahasraṃ dadāmīti hovāca janako vaidehaḥ sa hovāca yājñavaklyaḥpitā me'manyata nānanuśiṣya hareteti

'Let me hear whatever anyone may have told you.' 'Vidagdha, the son of Shakala, has told me that the heart (mind, here, Prajâpati) is Brahman.' 'As one who has a mother, father and teacher should say, so has the son of Shakala said this—that the heart is Brahman. For what can a person without the heart have? But did he tell you about its abode and support?' 'No, he did not.' 'This Brahman is only one-footed, O Emperor.' 'Then you tell us, Yâjnavalkya.' 'The heart is its abode, and the ether (Undifferentiated) its support. It should be meditated upon as stability.' 'What is stability, Yâjnavalkya?' 'The heart itself, O Emperor,' said Yâjnavalkya, 'the heart, O Emperor, is the abode of all beings, and the heart, O Emperor, is the support of all beings; on the heart, O Emperor, all beings rest; the heart, O Emperor, is the Supreme Brahman. The heart never leaves him who, knowing thus, meditates upon it, all beings eagerly come to him, and being a god, he attains the gods.' 'I give you a thousand cows with a bull like an elephant,' said Emperor Janaka. Yâjnavalkya replied, 'My father was of

4.1.7.p1

iti caturthādhyāye prathamaṃ brāhmaṇam