CC Madhya 23.76

varīyān īśvaraś ceti
guṇās tasyānukīrtitāḥ
samudrā iva pañcāśad
durvigāhā harer amī
Word for word: 
varīyān — the best; īśvaraḥ — the supreme controller; ca — and; iti — thus; guṇāḥ — the transcendental qualities; tasya — of Him; anukīrtitāḥ — described; samudrāḥ — oceans; iva — like; pañcāśat — fifty; durvigāhāḥ — difficult to penetrate fully; hareḥ — of the Supreme Personality of Godhead; amī — all these.
Translation: 
“ ‘Kṛṣṇa is the Supreme, and He is always glorified as the Supreme Lord and controller. Thus all the previously mentioned transcendental qualities are in Him. The fifty qualities of the Supreme Personality of Godhead mentioned above are as deep as an ocean. In other words, they are difficult to fully comprehend.