Śrīmad-Bhāgavatam 1.7.10, the verse in which sages already satisfied within the self nonetheless perform causeless bhakti to Uru-krama, ittham-bhūta-guṇo hariḥ — “such are Hari’s qualities.” Mahāprabhu explains it sixty-one ways in Madhya 24, and His interpretation becomes a demonstration of the verse’s own claim.