Ali al-Bashani (may Allah have mercy on him) said: I asked Abdullah bin al-Mubarak (may Allah have mercy on him) about a person who wipes his face with his hands when supplicating. He said: "I have not found any proof for it." Ali said: I did not see him doing that. He (may Allah have mercy on him) himself used to recite the qunut in the witr after the bowing, and he also used to raise his hands.
Hadith Referenceالسنن الكبرى للبيهقي / كتاب الصلاة / 3152