CC Madhya 25.156
“muktā api līlayā vigrahaṁ kṛtvā bhagavantaṁ bhajante”
“ ‘Even a liberated soul merged in the impersonal Brahman effulgence is attracted to the pastimes of Kṛṣṇa. He thus installs a Deity and renders the Lord service.’
This is a quotation from Śaṅkarācārya’s commentary on the Nṛsiṁha-tāpanī Upaniṣad.