This god Bel was Bel Marduk, the great god of the Babylonians, mentioned by Jeremiah and Isaiah. Every day, the people provided this idol 12 bushels of choice flour, 40 sheep, and 6 measures or about 50 gallons of wine. The king Cyrus revered Bel, as he worshipped this god on a daily basis. Bel may have been popular in Persia also. However, Daniel worshipped his own God, but there is no indication where he did this.
Yahweh points out to Jeremiah that their ancestors did not obey God’s commands. They did not listen because they were stubborn in their evil ways. They relied on their own counsels, looking backward rather than forward. Yet since the day that they left Egypt, Yahweh has sent his prophet servants to them on a daily basis. However, they still have not listened or paid attention. Instead they stiffened their necks and were more disobedient than their ancestors.