Musannaf Ibn Abi Shaybah

Hazrat Sha'bi and Hazrat Hakam state that ablution becomes obligatory if one vomits a mouthful.

Ibrahim was asked about vomiting a mouthful, so he said: When it becomes apparent, then there is (need for) ablution in it.

Hazrat Hakam and Hazrat Hammad state that ablution becomes obligatory if one vomits a mouthful.

Hazrat Ata says that when your food comes onto your tongue, then ablution (wudu) becomes obligatory.

Hazrat Ata says that vomiting breaks the ablution.

Hazrat Ata says that ablution is obligatory after vomiting.

Hazrat Qasim and Hazrat Salim say that ablution is obligatory after vomiting.