Mahabharata 12.188.1

भीष्म उवाच · bhīṣma uvāca

हन्त वक्ष्यामि ते पार्थ ध्यानयोगं चतुर्विधम्यं ज्ञात्वा शाश्वतीं सिद्धिं गच्छन्ति परमर्षयः

hanta vakṣyāmi te pārtha dhyānayogaṃ caturvidhamyaṃ jñātvā śāśvatīṃ siddhiṃ gacchanti paramarṣayaḥ

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