(16) باب جَوَازِ النَّافِلَةِ قَائِمًا وَقَاعِدًا وَفِعْلِ بَعْضِ الرَّكْعَةِ قَائِمًا وَبَعْضِهَا قَاعِدًا
'Abdullah b. Shaqiq reported:
I said to 'A'isha and she made a mention of that (recorded above) about the Messenger of Allah (ﷺ).
Reference: Sahih Muslim 732 b
In-book reference: Book 6, Hadith 139
USC-MSA web (English) reference(deprecated numbering scheme): Book 4, Hadith 1594