Sunan at-Tirmithiy كتاب الصلاة باب ما جاء فى التسليم فى الصلاة
حَدَّثَنَا أَبُو كُرَيْبٍ حَدَّثَنَا أَبُو بَكْرِ بْنُ عَيَّاشٍ حَدَّثَنَا أَبُو إِسْحَاقَ عَنْ عَاصِمِ بْنِ ضَمْرَةَ عَنْ عَلِىٍّ قَالَ الْوِتْرُ لَيْسَ بِحَتْمٍ كَصَلاَتِكُمُ الْمَكْتُوبَةِ وَلَكِنْ سَنَّ رَسُولُ اللَّهِ صلى الله عليه وسلم وَقَالَ إِنَّ اللَّهَ وِتْرٌ يُحِبُّ الْوِتْرَ فَأَوْتِرُوا يَا أَهْلَ الْقُرْآنِ. قَالَ وَفِى الْبَابِ عَنِ ابْنِ عُمَرَ وَابْنِ مَسْعُودٍ وَابْنِ عَبَّاسٍ. قَالَ أَبُو عِيسَى حَدِيثُ عَلِىٍّ حَدِيثٌ حَسَنٌ.
Alī Ibn-Abī-Tālib said, "The odd-numbered prayer (1) is not an obligation like your prescribed prayers are, but the Messenger of God, peace and blessings of God be upon him, introduced the practice and said, 'Indeed, God is One and loves the odd-numbered prayer. So pray the odd-numbered prayer, people of the Qur'ān.'"
(1): The voluntary night prayer that ends a person's worship for that day, and is performed in an odd number of prayer units (one unit, three units, etc.).
