The ruling on raising the hands after voluntary prayers and wiping the face

Question:
What is the ruling on raising the hands after the greeting of the mosque, voluntary prayers, and the regular voluntary prayers? And what is the ruling on wiping the face as well?

Answer:
Raising the hands is among the causes for the acceptance of supplication. It is reported in a hadith that it is among the causes for acceptance. So if one raises his hands after a voluntary prayer or at other times, there is no prohibition in doing so. However, one should not make it a constant habit, because the Messenger of Allah (peace and blessings be upon him) did not make it a constant habit, but rather did it at certain times.
As for after the obligatory prayers, the Messenger of Allah (peace and blessings be upon him) did not do it, nor did his Companions. But after voluntary prayers, due to the generality of the evidence for the permissibility of raising the hands in supplication, there is no harm in doing it at certain times, provided it is not made a constant habit.
As for wiping the face, it has not been preserved in authentic hadiths, but it has been reported in weak hadiths. So some scholars held that there is no harm in doing it, because the supplications reinforce one another and strengthen one another when he wipes his face. So there is no harm, but the better and more preferable course is to leave it, because the authentic hadiths do not include wiping after supplication.