King Videha said: I think that you must be direct associates of the Supreme Personality of Godhead, who is famous as the enemy of the demon Madhu. Indeed, the pure devotees of Lord Viṣṇu wander throughout the universe not for their personal, selfish interest, but to purify all the conditioned souls.
Srimad Bhagavata Purana
श्रीमद्भागवतमहापुराणम्
मूल श्लोकः
विदेह उवाच । मन्ये भगवतः साक्षात्पार्षदान् वो मधुद्विषः । विष्णोर्भूतानि लोकानां पावनाय चरन्ति हि
videha uvāca | manye bhagavataḥ sākṣātpārṣadān vo madhudviṣaḥ | viṣṇorbhūtāni lokānāṃ pāvanāya caranti hi
SB 11.2.28