Sayyiduna Abdullah bin Umar (may Allah be pleased with them both) reports about the Prophet (peace and blessings be upon him): He used to breathe three times in the vessel (that is, while drinking).
Imam al-Bazzar recorded this narration, and its narrators are thiqat (trustworthy).
Hadith Referenceمجمع الزوائد ومنبع الفوائد / كتاب الأشربة / 8261