Importance of Witr Namaz

As-salāmu ‘alaykum wa-rahmatullāhi wa-barakātuh.

The performance of Salāt al-Witr is Wājib (necessary). Hence it is necessary to do Qadhā of Salāt al-Witr.  

If one is not confident that he/she will wake up in the latter part of the night to offer Salāt al-Witr, then it should be performed before sleeping.  Since it is such an emphasized prayer, one should not risk its performance by sleeping before offering Salāt al-Witr if one is unsure or doubtful of waking up to perform Qiyām al-Layl. 

Mufti Ebrahim Desai shab.