al-Walid bin Hisham bin Mu'awiya الوليد بن هشام بن معاوية بن هشام · The Book on Purification

"Allah's Messenger vomited so he performed Wudu." So I met Thawban in a Masjid in Damascus, and I mentioned that to him. He said: 'He told the truth, I poured the water for his Wudu."