Atharvaśiras Upaniṣad 1

1

oṃ devā ha vai svargalokam āyaṃs te rudram apṛcchan ko bhavān iti /
so 'bravīd aham ekaḥ prathamam āsodvartāmi ca bhaviṣyāmi ca nānyaḥ kaścin matto vyatirikta iti /
so 'ntarād antaraṃ prāviśat diśaś cāntaraṃ prāviśat so 'haṃ nityānityo vyaktāvyakto brahmā brahmāhaṃ prāñcaḥ pratyañco 'haṃ dakṣiṇāṃ ca udañco 'ham adhaś cordhvaś cāhaṃ diśaś ca pratidiśaś cāhaṃ pumān apumān striyaś cāhaṃ sāvitry ahaṃ gāyatry ahaṃ triṣṭubjagatyanuṣṭup cāhaṃ chando 'haṃ satyo 'haṃ gārhapatyo dakṣiṇāgnir āhavanīyo 'haṃ gaur ahaṃ gaury aham ṛg ahaṃ yajur ahaṃ sāmāham atharvāṅgiraso 'haṃ jyeṣṭho 'haṃ śreṣṭho'haṃ variṣṭho 'ham āpo 'haṃ tejo 'haṃ guhyo 'ham araṇyo 'ham akṣaram ahaṃ kṣaram ahaṃ puṣkaram ahaṃ pavitram aham ugraṃ ca baliś ca purastāj jyotir ity aham eva sarvebhyo mām eva sa sarvaḥ samāyo māṃ veda sa devān veda sarvāṃś ca vedān sāṅgān api brahma brāhmaṇaiś ca gāṃ gobhir brāhmaṇān brāhmaṇyena havir haviṣā āyur āyuṣā satyena satyaṃ dharmeṇa dharmaṃ tarpayāmi svena tejasā /
tato ha vai te devā rudram apṛcchan te devā rudram apaśyan te devā rudram adhyāyan te devā ūrdhvabāhavo rudraṃ stuvanti //