Question: What is the ruling concerning raising one's hands during the Witr Prayer?
Response: It is legally sanctioned to raise one's hands during the supplications of the Witr Prayer. This is because it is similar to the supplications during times of affliction. It is confirmed that the Prophet (sal-Allaahu �alayhe wa sallam) used to raise his hands while supplicating during times of affliction. This was recorded by al-Bayhaqee, may Allaah have mercy on him, with an authentic chain.
Shaykh Ibn Baaz
Fataawa al-Mar.ah