Mishkat al-Masabih
Mishkat al-Masabih 1264
وَعَن عبد الله بن أبي قيس قَالَ: سَأَلْتُ عَائِشَةَ: بِكَمْ كَانَ رَسُولُ اللَّهِ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ يُوتِرُ؟ قَالَتْ: كَانَ يُوتِرُ بِأَرْبَعٍ وَثَلَاثٍ وَسِتٍّ وَثَلَاثٍ وَثَمَانٍ وَثَلَاثٍ وَعَشْرٍ وَثَلَاثٍ وَلَمْ يَكُنْ يُوتِرُ بِأَنْقَصَ مِنْ سَبْعٍ وَلَا بِأَكْثَرَ مِنْ ثَلَاث عشرَة. رَوَاهُ أَبُو دَاوُد
Unreviewed translation. All hadiths in this collection are available in five languages. Titles and introductions may remain in Arabic.
Abdullah ibn Abi Qays asked Aisha how many units the Messenger of God prayed for witr. She replied: He prayed four and three, six and three, eight and three, or ten and three. He never prayed witr with fewer than seven or more than thirteen units. Abu Dawud transmitted it.