[Machine] The Messenger of Allah ﷺ said, "Perform Witr prayer in odd numbers, and if you are unable, then perform it in three, and if you are still unable, then perform it in one."  

قَالَ رَسُولُ اللَّهِ ﷺ «الْوِتْرُ بِخَمْسٍ فَإِنْ لَمْ تَسْتَطِعْ فَبِثَلَاثٍ فَإِنْ لَمْ تَسْتَطِعْ فَبِوَاحِدَةٍ فَإِنْ لَمْ تَسْتَطِعْ» فَأَوْمِ إِيمَاءً  

[Machine] That the Messenger of Allah, peace be upon him, said, "Witr (odd number of units for prayer) is a right (obligation)." So he mentioned it in this way and they left it.  

أَنَّ رَسُولَ اللَّهِ ﷺ قَالَ «الْوِتْرُ حَقٌّ» فَذَكَرَهُ بِنَحْوِهِعدي تركوه