Bhagavad Gita 7.10 Chapter 7, Verse 10

बीजं मां सर्वभूतानां विद्धि पार्थ सनातनम् ।
बुद्धिर्बुद्धिमतामस्मि तेजस्तेजस्विनामहम् ॥७.१०॥

bījaṃ māṃ sarvabhūtānāṃ viddhi pārtha sanātanam
buddhirbuddhimatāmasmi tejastejasvināmaham

Meaning

O Partha, know me to be the eternal seed of all beings. I am the intelligence of the intelligent and the splendour of the splendid.

Newly written by Bhajan Dhun — scholarly review in progress.

Reference: Bhagavad Gita 7.10 (Chapter 7, The Yoga of Knowledge and Realisation, Verse 10)