"The Messenger of Allah ﷺ said: "O people of the Qur'an, pray witr, for Allah, the Mighty and Sublime, is Witr (One) and loves Al-Witr (the odd numbered).'"  

أَوْتَرَ رَسُولُ اللَّهِ ﷺ ثُمَّ قَالَ يَا أَهْلَ الْقُرْآنِ أَوْتِرُوا فَإِنَّ اللَّهَ ﷻ وِتْرٌ يُحِبُّ الْوِتْرَ  

"Witr is not essential like the obligatory prayers, but it is the sunnah of the Messenger of Allah ﷺ."  

الْوِتْرُ لَيْسَ بِحَتْمٍ كَهَيْئَةِ الْمَكْتُوبَةِ وَلَكِنَّهُ سُنَّةٌ سَنَّهَا رَسُولُ اللَّهِ ﷺ