Bhagavatapurana 11.3.15

11.3.15

indriyāṇi mano buddhiḥ saha vaikārikair nṛpa /
praviśanti hy ahaṅkāraṃ sva-guṇair aham ātmani //

15. The senses, the mind and (intellect) with their presiding deities, O king, merge into the principle of Ahankara which in its turn with all its constituent qualities merges into Mahattatva.