Wiping the Face after Supplicating
Question :
What is the ruling concerning wiping the face after the Witr supplication?
Answer:
Wiping the face after the supplication in the Qurut of Witr or otherwise has been mentioned in some weak Hadiths which Shaikh Al-Islam Ibn Taymiyyah said may not be used to establish a proof, and when they are weak then it is not possible to affirm a legislative religious ruling based on them. For this reason, it is better not to wipe the face after supplicating in Witr or at any other time. Some scholars say that these weak Hadiths when looked at together, result in the grade of Hasan by virtue of each other, thus making this practice Sunnah. However, I deem the right opinion to be not wiping the face because the various narrations don't in fact reach a level of Hasan.
Source:
Ibn 'Uthaimin
Fatawa Islamiyah, Vol. 7 Pages 274-275