Mahabharata 12.203.7

गुरुरुवाचशृणु शिष्य महाप्राज्ञ ब्रह्मगुह्यमिदं परम्अध्यात्मं सर्वभूतानामागमानां च यद्वसु

gururuvācaśṛṇu śiṣya mahāprājña brahmaguhyamidaṃ paramadhyātmaṃ sarvabhūtānāmāgamānāṃ ca yadvasu

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