vadanti tat tattva-vidas
tattvaṁ yaj jñānam advayam
brahmeti paramātmeti
bhagavān iti śabdyate
vadanti - they say; tat - that; tattva-vidaḥ - those who know the Absolute Truth; tattvam - the ultimate goal; yat - which; jñānam advayam - identical knowledge; brahma iti - as the impersonal Brahman; paramātmā iti - as the Supersoul; bhagavān iti - as the Supreme Personality of Godhead; śabdyate - it is described.
This is a quotation from Śrīmad-Bhāgavatam (1.2.11). For an explanation see Ādi-līlā, chapter two, text 11.