The Prophet ﷺ used to breathe three times into the drinking vessel.
حدثنا وكيع حدثنا عزرة بن ثابت الأنصاري حدثنا ثمامة بن عبد الله بن أنس
أن النبي ﷺ كان يتنفس في الإناء ثلاثا
No references are available.
Its isnad is sahih. Its narrators were mentioned before, and the hadith has already appeared at 12125.