When the Messenger of Allah ﷺ performed wudu, he would rinse his mouth and wipe his beard with water from underneath it.
وبه أن رسول الله ﷺ كان إذا توضأ تمضمض ومسح لحيته من تحتها بالماء
No references are available.
Its chain is daif because of Wasil bin Saaib and Abu Sawrah, and Haythami declared it daif at 2/271 and 1/230, on account of Wasil alone. It is found in Tabarani's Al-Kabir 4/178, no. 4967.