CC Ādi 8.28

anāyāse bhava-kṣaya, kṛṣṇera sevana
eka kṛṣṇa-nāmera phale pāi eta dhana
Word for word: 
anāyāse — without hard labor; bhava-kṣaya — stoppage of repetition of birth and death; kṛṣṇera — of Lord Kṛṣṇa; sevana — service; eka — one; kṛṣṇa-nāmera — chanting the name of Kṛṣṇa; phale — as a result of; pāi — we achieve; eta — so much; dhana — wealth.
Translation: 
As a result of chanting the Hare Kṛṣṇa mahā-mantra, one makes such great advancement in spiritual life that simultaneously his material existence terminates and he receives love of Godhead. The holy name of Kṛṣṇa is so powerful that by chanting even one name, one very easily achieves these transcendental riches.