Steya-doṣa-nirūpaṇa (On the Nature and Gravity of Theft) — within the Hayagrīva–Agastya Saṃvāda frame
अत्रैवोदाहरन्तीममितिहासं पुरातनम् / रहस्यातिरहस्यं च सर्वपापप्रणाशनम्
atraivodāharantīmamitihāsaṃ purātanam / rahasyātirahasyaṃ ca sarvapāpapraṇāśanam
Here itself they relate an ancient itihāsa as an example— a secret beyond secrets, the destroyer of all sins.