"Al-Witr is not incumbent like your obligatory prayers, but it is a Sunnah of Messenger of Allah who said: "Indeed Allah is Witr (One), and He loves Al-Witr, so perform Al-Witr O people of the Qur'an."  

الْوِتْرُ لَيْسَ بِحَتْمٍ كَصَلاَتِكُمُ الْمَكْتُوبَةِ وَلَكِنْ سَنَّ رَسُولُ اللَّهِ ﷺ وَقَالَ إِنَّ اللَّهَ وِتْرٌ يُحِبُّ الْوِتْرَ فَأَوْتِرُوا يَا أَهْلَ الْقُرْآنِ قَالَ وَفِي الْبَابِ عَنِ ابْنِ عُمَرَ وَابْنِ مَسْعُودٍ وَابْنِ عَبَّاسٍ  

“Witr is not definite (obligatory) nor is it like your prescribed prayers. But the Messenger of Allah ﷺ prayed Witr, then he said: ‘O people of the Qur’an! Perform Witr, for Allah is Witr* and He loves the odd (numbered).’” * Meaning 'one' which is the first of the odd numbers; He is unique, and there is nothing like Him, similar or equal.  

عَلِيُّ بْنُ أَبِي طَالِبٍ إِنَّ الْوِتْرَ لَيْسَ بِحَتْمٍ وَلاَ كَصَلاَتِكُمُ الْمَكْتُوبَةِ وَلَكِنْ رَسُولُ اللَّهِ ﷺ أَوْتَرَ ثُمَّ قَالَ يَا أَهْلَ الْقُرْآنِ أَوْتِرُوا فَإِنَّ اللَّهَ وِتْرٌ يُحِبُّ الْوِتْرَ  

‘Ali ؓ said: Verily, Witr is not a must like your prescribed prayers, but the Messenger of Allah ﷺ prayed Witr, then he said: “Pray Witr, O people of the Qurʿan. Pray Witr, for Allah is One and loves that which is odd numbered.”  

عَلِيٌّ أَلا إِنَّ الْوَتْرَ لَيْسَ بِحَتْمٍ كَصَلاتِكُمِ الْمَكْتُوبَةِ وَلَكِنَّ رَسُولَ اللهِ ﷺ أَوْتَرَ ثُمَّ قَالَ أَوْتِرُوا يَا أَهْلَ الْقُرْآنِ أَوْتِرُوا فَإِنَّ اللهَ وَتْرٌ يُحِبُّ الْوَتْرَ وَهَذَا لَفْظُ حَدِيثِ عَبْدِ اللهِ بْنِ صَنْدَلٍ وَمَعْنَاهُمَا وَاحِدٌ  

"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).'" (Using translation from Nasāʾī 1675)  

أَوْتَرَ رَسُولُ اللهِ ﷺ ثُمَّ قَالَ «يَا أَهْلَ الْقُرْآنِ أَوْتِرُوا؛ فَإِنَّ اللهَ وِتْرٌ يُحِبُّ الْوِتْرَ»  

[Machine] "Witr is not an obligatory prayer like the prescribed prayers, but it is a recommended sunnah that the Messenger of Allah ﷺ established. He said, 'Perform Witr, O people of the Quran, for indeed Allah, the Exalted, is odd and He loves the odd-numbered prayer.'"  

الْوِتْرُ لَيْسَ بِحَتْمٍ كَالصَّلَاةِ الْمَكْتُوبَةِ وَلَكِنَّهُ سُنَّةٌ سَنَّهَا رَسُولُ اللهِ ﷺ فَقَالَ أَوْتِرُوا يَا أَهْلَ الْقُرْآنِ فَإِنَّ اللهَ تَعَالَى وِتْرٌ يُحِبُّ الْوِتْرَ