Hashaym bin Bashayr bin al-Qasim هشيم بن بشير بن القاسم · The Book of Purification

"There are two things which I never asked anyone about after I saw the Messenger of Allah (ﷺ). He was with us on a journey and he went away to relieve himself, then he came and performed Wudu', and he wiped over his forehead and two sides of his 'Imamah, and he wiped over his Khuffs." He said: "And (the other issue) the Imam's Salah behind one of his followers. I saw the Messenger of Allah (ﷺ) when he was…

It was narrated from Umm Qais bin Mihsan that she brought a small son of hers who has not started eating food to the Messenger of Allah (ﷺ). The Messenger of Allah (ﷺ) took him in his lap and he urinated on his garment, so he called for some water and sprinkled it on it, but he did not wash it.