2 occurrences in 2 dictionaries

Reference: Belly

Easton

the seat of the carnal affections (Tit 1:12; Php 3:19; Ro 16:18). The word is used symbolically for the heart (Pr 18:8; 20:27; 22:18, marg.). The "belly of hell" signifies the grave or underworld (Jon 2:2).

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Watsons

BELLY is used in Scripture for gluttony, Tit 1:12; Philipians 3:16; Ro 16:18. For the heart, or the secrets of the mind, Pr 20:27,30; 22:18. The "belly of hell" signifies the grave, or some imminent danger, or deep distress, Jon 2:2; Ecclus. 2:5.

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Basic English, produced by Mr C. K. Ogden of the Orthological Institute - public domain