My dear King, although Kali-yuga is an ocean of faults, there is still one good quality about this age: Simply by chanting the Hare Kṛṣṇa mahā-mantra, one can become free from material bondage and be promoted to the transcendental kingdom.
Srimad Bhagavata Purana
श्रीमद्भागवतमहापुराणम्
मूल श्लोकः
कलेर्दोषनिधे राजन्नस्ति ह्येको महान् गुणः । कीर्तनादेव कृष्णस्य मुक्तसङ्गः परं व्रजेत्
kalerdoṣanidhe rājannasti hyeko mahān guṇaḥ | kīrtanādeva kṛṣṇasya muktasaṅgaḥ paraṃ vrajet
SB 12.3.51