وَعَنِ ابْنِ عُمَرَ
قَالَ: قَالَ رَسُولُ اللَّهِ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ: «الْوَتْرُ رَكْعَةٌ مِنْ آخر اللَّيْل»
He reported God’s Messenger as saying, “The witr* is a raka at the end of the night.” * Literally ‘single’, or ‘odd’, used of an odd number of rakas prayed at some time during the night.