The Prophet ﷺ said: Allah is single (witr) and loves what is single, so observe the witr, you who follow the Qur'an.  

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

A bedouin said: What are you saying ? He replied: This is neither for you, nor for your companions.  

عَنِ النَّبِيِّ ﷺ بِمَعْنَاهُ زَادَ فَقَالَ أَعْرَابِيٌّ مَا تَقُولُ فَقَالَ لَيْسَ لَكَ وَلاَ لأَصْحَابِكَ  

The Messenger of Allah ﷺ came out to us and said: Allah the Exalted has given you an extra prayer which is better for you then the red camels (i.e. high breed camels). This is the witr which Allah has appointed for you between the night prayer and the daybreak.  

خَرَجَ عَلَيْنَا رَسُولُ اللَّهِ ﷺ فَقَالَ إِنَّ اللَّهَ ﷻ قَدْ أَمَدَّكُمْ بِصَلاَةٍ وَهِيَ خَيْرٌ لَكُمْ مِنْ حُمْرِ النَّعَمِ وَهِيَ الْوِتْرُ فَجَعَلَهَا لَكُمْ فِيمَا بَيْنَ الْعِشَاءِ إِلَى طُلُوعِ الْفَجْرِ