Mundaka 4.02
एतज्जानथ सदसद्वरेण्यं परं विज्ञानाद् यद्वरिष्ठं प्रजानाम्। यदर्चिमद् यदणुभ्योऽणु च यस्मिन् लोका निहिता लोकिनश्च ॥२॥
Understand this as the most excellent reality beyond mastered-knowledge, supreme among beings, radiant and subtler than minute particles, in which all worlds and their inhabitants reside.
Bhāshya 4.02
Beyond 'vijñānā' i.e. mastered-knowledge or science, is the ultimate Brahman. A testimonial from Bhāgavata Purāṇa is provided to elaborate on this aspect.
विज्ञानाद् ब्रह्मणः परम्।
Beyond 'vijñānā' i.e. mastered-knowledge, is the ultimate Brahman.
"नाभिहृदादिह सतोऽम्भसि यस्य पुंसो विज्ञानशक्तिरहमासमनन्तशक्तेः।"
"At the beginning of the universe, in the primordial waters, at the navel and heart of existence, I embodied the power of knowledge of the infinitely powerful being."
इति भागवते।
- stated thus in the Bhāgavata Purāṇa.