(1) gītā-śāstram idaṁ puṇyaṁ yaḥ paṭhet prayataḥ pumān viṣṇoh padaṁ avapnoti bhaya-śokādi-varjitaḥ
(2) gītādhyāyana-śīlasya prāṇayama-parasya ca naiva santi hi pāpāni pūrva-janma-kṛtāni ca
(3) mala-nirmocanaṁ pumsāṁ jala-snānaṁ dine dine sakṛd-gītāmṛta snānaṁ saṁsāra-mala-nāśanam
etc
rest is in the end of introduction.
According to Wiki, it is from Uttarakhanda of Padma Purana, but where is it exactly?