question #2 Sahih al-Bukhari 991, Book 14, Hadith 2 : How did Abdullah bin Umar manage his prayer routine when he needed to attend to a matter during Witr prayer?

Nafi` told that `Abdullah bin
`Umar used to say Taslim between (the first) two Rak`at and (the third)
odd one in the Witr prayer, when he wanted to attend to a certain
matter (during that interval between the Rak`at).