CC Madhya 23.69

ananta kṛṣṇera guṇa, cauṣaṭṭi — pradhāna
eka eka guṇa śuni’ juḍāya bhakta-kāṇa
Word for word: 
ananta — unlimited; kṛṣṇera — of Lord Kṛṣṇa; guṇa — qualities; cauṣaṭṭi — sixty-four; pradhāna — chief ones; eka eka — one by one; guṇa — qualities; śuni’ — hearing; juḍāya — satisfies; bhakta-kāṇa — the ears of the devotees.
Translation: 
“The transcendental qualities of Lord Kṛṣṇa are unlimited. Out of these, sixty-four are considered prominent. The ears of the devotees are satisfied simply by hearing all these qualities one after the other.