(17) باب صَلاَةِ اللَّيْلِ وَعَدَدِ رَكَعَاتِ النَّبِيِّ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ فِي اللَّيْلِ وَأَنَّ الْوِتْرَ رَكْعَةٌ وَأَنَّ الرَّكْعَةَ صَلاَةٌ صَحِيحَةٌ
A hadith like this has been narrated by 'A'isha by another chain of transmitters. (IT)
Reference (IT): Sahih Muslim 743 b (IT)
In-book reference (IT): Book 6, Hadith 162 (IT)
USC-MSA web (English) reference(deprecated numbering scheme): Book 4, Hadith 1617 (IT)