avatari' caitanya kaila dharma-pracāraṇa
avatari'-descending; caitanya—Śrī Caitanya Mahāprabhu; kaila—did; dharma-pracāraṇa—preaching of real religion; kali-kāle—in this Age of Kali; dharma—religious principle; kṛṣṇa-nāma—of the holy name of Lord Kṛṣṇa; saṅkīrtana—chanting.
"In this Age of Kali, Śrī Caitanya Mahāprabhu has descended to preach the religion of Kṛṣṇa consciousness. Therefore the chanting of the holy names of Lord Kṛṣṇa is the religious principle for this age.
Link to this page: https://prabhupadabooks.com/cc/madhya/11/98