Mahabharata 12.178.14

पक्वाशयस्त्वधो नाभेरूर्ध्वमामाशयः स्थितःनाभिमध्ये शरीरस्य सर्वे प्राणाः समाहिताः

pakvāśayastvadho nābherūrdhvamāmāśayaḥ sthitaḥnābhimadhye śarīrasya sarve prāṇāḥ samāhitāḥ

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