Mahabharata 12.187.2

भीष्म उवाच · bhīṣma uvāca

अध्यात्ममिति मां पार्थ यदेतदनुपृच्छसितद्व्याख्यास्यामि ते तात श्रेयस्करतरं सुखम्

adhyātmamiti māṃ pārtha yadetadanupṛcchasitadvyākhyāsyāmi te tāta śreyaskarataraṃ sukham

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