Mahabharata 12.326.97

एतत्ते सर्वमाख्यातं ब्रह्मन्भक्तिमतो मयापुराणं च भविष्यं च सरहस्यं च सत्तम

etatte sarvamākhyātaṃ brahmanbhaktimato mayāpurāṇaṃ ca bhaviṣyaṃ ca sarahasyaṃ ca sattama

Our plain-language meaning of this verse is waiting for scholar review.