It wasnarrated from Abu Hurairah that the Messenger of Allah (ﷺ)said:
"It is impolite for a man to wipe his forehead a great dealbeforehe finishes prayer." (RU)
English reference (RU): Vol. 1, Book 5, Hadith 964 (RU)
Arabic reference (RU): Book 5, Hadith 1017 (RU)