Mahabharata 12.247.12

भीष्म उवाच · bhīṣma uvāca

आहुः षष्टिं भूतगुणान्वै; भूतविशिष्टा नित्यविषक्ताःभूतविषक्ताश्चाक्षरसृष्टाः; पुत्र न नित्यं तदिह वदन्ति

āhuḥ ṣaṣṭiṃ bhūtaguṇānvai; bhūtaviśiṣṭā nityaviṣaktāḥbhūtaviṣaktāścākṣarasṛṣṭāḥ; putra na nityaṃ tadiha vadanti

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