Chapter 7 · Knowledge and Realisation · Krishna said
Bhagavad Gita 7.10 — The eternal seed
बीजं मां सर्वभूतानां विद्धि पार्थ सनातनम्। बुद्धिर्बुद्धिमतामस्मि तेजस्तेजस्विनामहम् ॥
bījaṃ māṃ sarvabhūtānāṃ viddhi pārtha sanātanam | buddhirbuddhimatāmasmi tejastejasvināmaham ||
Meaning
Know me, Partha, as the eternal seed of all beings. I am the intelligence of the intelligent and the brilliance of the brilliant.