Shaṭpraśnopaniṣat Bhāshya (षट्प्रश्नोपनिषद्भाष्यं)
Shat.Upa 05.01
अथ हैनं शैब्यः सत्यकामः पप्रच्छ।
Then Shaibya Satyakama asked him:
स यो ह वै तद्भगवन् मनुष्येषु प्रायणान्तमोङ्कारमभिध्यायीत। कतमं वाव स तेन लोकं जयतीति॥
O Lord, which world does a man conquer by meditating on the syllable 'Om' at the time of death?
तस्मै स होवाच।
He spoke to him:
एतद्वै सत्यकाम परं चापरं च ब्रह्म यदोङ्कारः। तस्माद्विद्वानेतेनैवायनेनैकतरमन्वेति ॥१॥
O Satyakama, the sound 'Om' is both the higher and lower Brahman. Thus, the wise man reaches one of these paths through it.

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बहुचित्रजगद्बहुधाकरणात् परशक्तिरनन्तगुणः परमः ।
सुखरूपममुष्य पदं परमं स्मरतस्तु भविष्यति तत्सततम् ॥
"The one who has created this variegated vast universe with varied forms has infinite power and is of infinite auspicious qualities. He certainly bestows the highest state of bliss to those who meditate on his ever happy essence." -Dwādasha stōtra 4.3

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