As others have said throughout these comments, as long as you keep the temperature high constantly, it won't be an issue. Bacteria won't survive in simmering w

As others have said throughout these comments, as long as you keep the temperature high constantly, it won't be an issue. Bacteria won't survive in simmering water, so time alone will not cause it to go bad. The toxins that bacteria produce can survive, which means tainted ingredients being added might spoil it, but as always, the poison is in the dose. With a large enough pot, a couple pieces of spoiled food likely won't cause illness.