Śrīmad-Bhāgavatam · Text 3.6.23
Who is speaking and story frame
बुद्धिं चास्य विनिर्भिन्नां वागीशो धिष्ण्यमाविशत् ।
बोधेनांशेन बोद्धव्यम् प्रतिपत्तिर्यतो भवेत् ॥ २३ ॥
buddhiṁ cāsya vinirbhinnāṁ
vāg-īśo dhiṣṇyam āviśat
bodhenāṁśena boddhavyam
pratipattir yato bhavet
When the intelligence of the gigantic form separately became manifest, Brahmā, the lord of the Vedas, entered into it with the partial power of understanding, and thus an object of understanding is experienced by the living entities.
Read this verse on Vedabase.ioThis verse has no purport; its meaning is explained by the verses around it.