sei saba - all those; vaiṣṇava - devotees; mahāprabhura - of Śrī Caitanya Mahāprabhu; darśane - by seeing; kṛṣṇa-upāsaka - devotees of Lord Kṛṣṇa; haila - became; laya - took; kṛṣṇa-nāme - the holy name of Lord Kṛṣṇa.

After meeting Śrī Caitanya Mahāprabhu, all those different Vaiṣṇavas became devotees of Kṛṣṇa and began chanting the Hare Kṛṣṇa mahā-mantra.