bhaktyaham ekaya grahyah
sraddhayatma priyah satam
bhaktih punati man-nistha
sva-pakan api sambhavat
bhaktya—by devotional service; aham—I, the Supreme Personality of Godhead; ekaya—unflinching; grahyah—obtainable; sraddhaya—by faith; atma—the most dear; priyah—to be served; satam—by the devotees; bhaktih—the devotional service; punati—purifies; mat-nistha—fixed only on Me; sva-pakan—the lowest grade of human beings, who are accustomed to eating dogs; api—certainly; sambhavat—from all faults due to birth and so on.
" 'Being very dear to the devotees and sadhus, I am attained through unflinching faith and devotional service. This bhakti-yoga system, which gradually increases attachment for Me, purifies even a human being born among dog-eaters. That is to say, everyone can be elevated to the spiritual platform by the process of bhakti-yoga.'
This verse is from Srimad-Bhagavatam (11.14.21).
Link to this page: https://prabhupadabooks.com/cc/madhya/25/136