Mahabharata 13.112.4

भीष्म उवाच · bhīṣma uvāca

असावायाति भगवान्बृहस्पतिरुदारधीःपृच्छैनं सुमहाभागमेतद्गुह्यं सनातनम्

asāvāyāti bhagavānbṛhaspatirudāradhīḥpṛcchainaṃ sumahābhāgametadguhyaṃ sanātanam

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