Abu Shaibah Mehri, may Allah have mercy on him, who used to preach in Constantinople, says that once a person said to Hazrat Thawban, may Allah be pleased with him, "Tell us a hadith." So he said, "I have seen that once the Prophet Muhammad, peace and blessings be upon him, vomited, so the Prophet Muhammad, peace and blessings be upon him, broke his fast."
Hadith Referenceمسند احمد / مسند الأنصار رضي الله عنهم / 22443
Hadith Gradingحکم دارالسلام:حديث صحيح، وهذا إسناد ضعيف، بلج وشيخه مجهولان