Gita Mahatmya
Varāha Purāṇa, Gītā-māhātmya 14
These verses glorify the Bhagavad-gītā. They come from other scriptures and are not verses of the Bhagavad-gītā itself. Each one carries its own source.
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Gītā-māhātmya
अध्यायं श्लोकपादं वा नित्यं यः पठते नरः ।
स याति नरतां यावन्मन्वन्तरं वसुन्धरे ॥adhyāyaṁ ślokapādaṁ vā nityaṁ yaḥ paṭhate naraḥ
sa yāti naratāṁ yāvanmanvantaraṁ vasundhareO Earth, a person who reads one chapter, or even one quarter of a verse, every day keeps getting a human birth for a whole manvantara (a very long age).
Source: Varāha Purāṇa, Gītā-māhātmya 14