CC Madhya 19.126

kaiche aṣṭa-prahara karena śrī-kṛṣṇa-bhajana?”
tabe praśaṁsiyā kahe sei bhakta-gaṇa
Word for word: 
kaiche — how; aṣṭa-prahara — twenty-four hours; karena — do; śrī-kṛṣṇa-bhajana — worshiping of Lord Kṛṣṇa; tabe — at that time; praśaṁsiyā — praising; kahe — described; sei bhakta-gaṇa — those devotees.
Translation: 
The Lord’s associates would also ask, “How is it that Rūpa and Sanātana are engaging in devotional service twenty-four hours daily?” At that time the person who had returned from Vṛndāvana would praise Śrīla Rūpa and Sanātana Gosvāmīs.