Tosefta Mikvaot

If someone swallowed an olive’s bulk of a corpse and entered a house, the house is pure, for everything that is swallowed by a human or cattle or a wild animal or birds is pure. If it decomposed or came out below [as excrement], it is pure.⁠a If someone drank impure water and vomited it up, it is impure, because it was defiled when it came out. If one immersed, or if it decomposed, or if it came out below, it is pure. If one drank other [impure] liquids, if he immersed and vomited them out, they are impure, because they were not purified in the body. If they decomposed or went out below [as urine], they are pure. If a cow which drank impure water vomited it up, it is impure, because it was not purified in the body. If it decomposed or came out below [as urine], it is pure.