(16) باب التَّشَهُّدِ فِي الصَّلاَةِ
Abdullah b. Mas'ud reported:
We were sitting with the Apostle (ﷺ) in prayer, and the rest of the hadith is the same as narrated by Mansur He (also said): After (reciting tashahud) he may choose any prayer.
Reference: Sahih Muslim 402 d
In-book reference: Book 4, Hadith 62
USC-MSA web (English) reference(deprecated numbering scheme): Book 4, Hadith 796