Did Al-Shawkani and Ibn Hazm Al-Dhahiri affirm that vomit is not impure? And did the Malikis affirm that vomit is not impure if it has not changed from its original state? And was the ruling on the impurity of vomit based on a hadith that Al-Nawawi declared void and Al-Shawkani deemed weak?

It appears that Ibn Hazm agrees with the rest of the scholars regarding the impurity of vomit, and whoever attributes otherwise to him must provide proof. We have seen statements from him indicating his view of its impurity, as he said in al-Muhalla: "Vomit from any Muslim or disbeliever is forbidden and must be avoided." His statement "must be avoided" indicates its impurity, just as he inferred the impurity of vomit in the context of his discussion about small amounts of water that are not defiled by contact with impurities.

As for al-Shawkani, he explicitly stated the purity of vomit, arguing that the default state of things is purity, and one does not deviate from this default except with sound and valid evidence. He refuted the use of 'Ammar's hadith, clarifying that it has not been authentically or even acceptably transmitted.

The Maliki school of thought holds that vomit is not impure unless it exits in an altered state.

Those who assert the impurity of vomit do not rely solely on the weak hadith of 'Ammar; rather, they also argue by analogy, viewing vomit as food that has transformed in the stomach into foulness and corruption, thus making it impure like feces. As for unaltered vomit, it is safer to wash it and avoid it.