John Trapp on Jeremiah 51:44

Ver. 44. And I will puniſh Bel in Babylon] Nimrod was after his death called the Babylonian Saturn: Belus, who ſucceeded him, the Babylonian Jupiter, as Beroſus teſtifieth. This Idol of maſſy gold and of a huge bigneſſe, was carried away by Cyrus: thus Bel was puniſhed.

And I will bring forth out of his mouth that which he hath ſwallowed up] Bolum ex ore Beli: ſuch an elegancy there is alſo in the Original. Of the rich preſents, ſpoils, coſtly furniture found in Bel's Temple, ſee Diodore lib. 2. Thoſe taken from Gods Temple at Jeruſalem, and laid up in his, 2 Chron. 36.7. he was forced to regurgitate, Ezr. 1.7. & 5.14. See Job 20.12, 15.

Yea the wall of Babylon ſhall fall] Which yet was ſtrong to a miracle, as being two hundred cubites high (of the Kings cubites which were larger then ordinary) and fifty cubites thick; having a hundred brazen gates, and many ſtately towers, &c. All ſhall down ſaith the Prophet.