It wasnarrated that Umm Jundub said:
"I saw the Messenger of Allah(ﷺ)stoning the 'Aqabah Pillar from the bottom of the valley on theDayof Sacrifice, then he went away. A woman from Khath'am followedhim, and with her was a son of hers who had been afflicted, he couldnot speak. She said: 'O Messenger of Allah! This is my son, and heisall I have left of my family. He has been afflicted and cannotspeak.'The Messenger of Allah (ﷺ) said: 'Bring me some water.'So it wasbrought, and he washed his hands and rinsed out his mouth.Then hegave it to her and said: 'Give him some to drink, and poursome overhim, and seek Allah's healing for him.'" She (UmmJundub) said: "I metthat woman and said: 'Why don't you giveme some?' She said: 'It isonly for the sick one.' I met thatwoman one year later and asked herabout the boy. She said: 'Herecovered and became (very) smart, notlike the rest of the people.'"
English reference: Vol. 4, Book 31, Hadith 3532
Arabic reference: Book 31, Hadith 3662