Jamieson, Fausset & Brown, on Jer 51:44

“And I will visit against Bel in Babylon, and I will bring forth out of his mouth that which he had swallowed down: and the rations shall no more flow together to him, for the wall also of Babylon shall fall.”

“Bel . . . swallowed--in allusion to the many sacrifices to the idol which its priests pretended it swallowed at night; or rather, the precious gifts taken from other nations and offered to it (which it is said to have "swallowed"; compare "devoured," "swallowed," Jer 51:34; Jer 50:17), which it should have to disgorge (compare Jer 51:13; Jer 50:37). Of these gifts were the vessels of Jehovah's temple in Jerusalem (Ch2 36:7; Dan 1:2). The restoration of these, as foretold here, is recorded in Ezr 1:7-11. flow--as a river; fitly depicting the influx of pilgrims of all "nations" to the idol.”

Imported from an open dataset — not yet checked against the printed edition.