Mandukya Upanishad, first verse:
Mandukya Upanishad, first verse: Text हरिः ओम् । ओमित्येतदक्षरमिदं सर्वं तस्योपव्याख्यानं भूतं भवद्भविष्यदिति सर्वमोङ्कार एव | यच्चान्यत्त्रिकालातीतं तदप्योङ्कार एव ॥ १ ॥ hariḥ om | omityetadakṣaramidaṃ sarvaṃ tasyopavyākhyānaṃ bhūtaṃ bhavadbhaviṣyaditi sarvamoṅkāra eva | yaccānyattrikālātītaṃ tadapyoṅkāra eva || 1 || 1. Hariḥ Aum. Aum, the word, is all this. A clear explanation of it (is the following). All that is past, present and future is verily Aum. That which is beyond the triple conception of time, is also truly Aum....