Kṛṣṇa-kathā is the only remedy for all people of the world because it can situate one in pure consciousness of the self and liberate one from material bondage. To preach kṛṣṇa-kathā all over the world, as recommended by Lord Caitanya, is the greatest missionary activity, and all sensible men and women of the world may join in this great movement started by Lord Caitanya.
-Shrimad Bhagvatam Canto 3 Chapter 5 Verse 11, Translation and Purport

अनन्तविजयं राजा कुन्तीपुत्रो युधिष्ठिरः ।
नकुलः सहदेवश्च सुघोषमणिपुष्पकौ ॥ १६ ॥
King Yudhiṣṭhira, the son of Kuntī, blew his conchshell, the Ananta-vijaya, and Nakula and Sahadeva blew the Sughoṣa and Maṇipuṣpaka.
-BG 1.16