Passage
Taittiriya Upanisad TaittU_3,10.6
san taittiriya
ahamannam ahamannam ahamannam / aham annādo3 'ham annādo3 'hamannādaḥ / ahaṃ ślokakṛd ahaṃ ślokakṛd ahaṃ ślokakṛt / ahamasmi prathamajā ṛtā3sya / pūrvaṃ devebhyo 'mṛtasya nā3bhāyi / yo mā dadāti sa ideva mā3vāḥ / aham annam annam adantam ā3dmi / ahaṃ viśvaṃ bhuvanam abhyabhavā3m / suvarna jyotiḥ / ya evaṃ veda / ityupaniṣat