CC Madhya 24.175
kṛṣṇa-kṛpāya sādhu-kṛpāya doṅhāra bhajana
muni-śabde — by the word muni; pakṣī — bird; bhṛṅga — bumblebee; nirgranthe — by the word nirgrantha; mūrkha-jana — foolish people; kṛṣṇa-kṛpāya — by the mercy of Lord Kṛṣṇa; sādhu-kṛpāya — by the mercy of a devotee; doṅhāra bhajana — engages in devotional service of both (Kṛṣṇa and his spiritual master or the sādhu).
“The word ‘muni’ also means ‘bird’ and ‘bumblebee.’ The word ‘nirgrantha’ refers to foolish people. By the mercy of Kṛṣṇa, such creatures contact a sādhu [spiritual master] and thus engage in devotional service.