Srimad-Bhagavatam: Canto 12 - Chapter 3 - Verse 52
Srimad-Bhagavatam: Canto 12 - Chapter 1 - Verse 52 Sanskrit: कृते यद्ध्यायतो विष्णुं त्रेतायां यजतो मखै: ।द्वापरे परिचर्यायां कलौ तद्धरिकीर्तनात् ॥ ५२ ॥ ITRANS: kṛte yad dhyāyato viṣṇuṁtretāyāṁ yajato makhaiḥdvāpare paricaryāyāṁkalau tad dhari-kīrtanāt Translation: Whatever result was obtained in Satya-yuga by meditating on Viṣṇu, in Tretā-yuga by performing sacrifices, and in Dvāpara-yuga by serving the Lord’s lotus feet can be obtained in Kali-yuga simply by chanting the Hare Kṛṣṇa mahā-mantra....