Why Do We Raise Up And Then Fold Our Hands Again In The Third Rakat Of Witr Prayer?

Why do we raise up and then fold our hands again in the third rakat of witr prayer?

Acts of worship are tawqifi matters in Islamic law, that is to say, they are performed as commanded by Allah and described by the Prophet Muhammad (saw). The practice of raising hands before Qunut duas during takbir and folding them again in witr prayer is based on some narratives coming from the Prophet Muhammad (saw) (Abu Yusuf, al-Asar, p. 21; Zaylai, Nasbu’r-raya, I, 389-391; Mubarakfuri, Tuhfa, II, 567).

Source: Presidency Of Religious Affairs The Turkey, High Board of Religious Affairs FATWA