Abu Hurairah (RAA) narrated that the Messenger of Allah (ﷺ) said:
"When one of you is flogging (while inflicting a prescribed punishment) he should avoid the face." Agreed upon. (RU)
English reference (RU): Book 10, Hadith 1283 (RU)
Arabic reference (RU): Book 10, Hadith 1244 (RU)