Srimad-Bhagavatam: Canto 12 - Chapter 1 - Verse 59
Sanskrit:
य एतत् श्रावयेन्नित्यं यामक्षणमनन्यधी: ।श्लोकमेकं तदर्धं वा पादं पादार्धमेव वा ।श्रद्धावान् योऽनुशृणुयात् पुनात्यात्मानमेव स: ॥ ५९ ॥
ITRANS:
ya etat śrāvayen nityaṁyāma-kṣaṇam ananya-dhīḥślokam ekaṁ tad-ardhaṁ vāpādaṁ pādārdham eva vāśraddhāvān yo ’nuśṛṇuyātpunāty ātmānam eva saḥ
Translation:
One who with undeviating attention constantly recites this literature at every moment of every hour, as well as one who faithfully hears even one verse or half a verse or a single line or even half a line, certainly purifies his very self.