Kāthakopaniṣat Bhāshya (काठकोपनिषत् )
1.1.21
This was indeed doubted even by the gods, O Death, and you have said it is not easily understood. No one like you can speak of it, and no other boon is equal to this one.

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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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