Sunan Abi Dawud
Prayer (Kitab Al-Salat): Detailed Injunctions about Witr — Hadith #1432
Traditional grade: Sahih, Daif How we grade
حَدَّثَنَا ابْنُ الْمُثَنَّى، حَدَّثَنَا أَبُو دَاوُدَ، حَدَّثَنَا أَبَانُ بْنُ يَزِيدَ، عَنْ قَتَادَةَ، عَنْ أَبِي سَعِيدٍ، - مِنْ أَزْدِ شَنُوءَةَ - عَنْ أَبِي هُرَيْرَةَ، قَالَ أَوْصَانِي خَلِيلِي صلى الله عليه وسلم بِثَلاَثٍ لاَ أَدَعُهُنَّ فِي سَفَرٍ وَلاَ حَضَرٍ رَكْعَتَىِ الضُّحَى وَصَوْمِ ثَلاَثَةِ أَيَّامٍ مِنَ الشَّهْرِ وَأَنْ لاَ أَنَامَ إِلاَّ عَلَى وِتْرٍ .
My friend (i.e. the Prophet) instructed me to observe three practices that I do not leave while traveling nor while resident, to pray two rak`ahs in the forenoon, to fast three days every month and not to sleep but after observing the witr.
Hadith Grading
Each grade below reflects one scholar's assessment of the chain of transmission. The grade describes the chain, not the Prophet's words. How we grade
Traditional grade: Sahih, Daif