CC Antya 5.155

kṛṣṇe gāli dite kare nāma uccāraṇa
sei nāma haya tāra ‘muktira’ kāraṇa”
Word for word: 
kṛṣṇe — Lord Kṛṣṇa; gāli dite — to blaspheme or chastise; kare nāma uccāraṇa — chants the name of Kṛṣṇa; sei nāma — that holy name; haya — becomes; tāra — his; muktira kāraṇa — the cause of liberation.
Translation: 
“Sometimes it so happens that one who wants to chastise Kṛṣṇa utters the holy name, and thus the holy name becomes the cause of his liberation.”