question #3 Sahih al-Bukhari 993, Book 14, Hadith 4 : What variations in the number of rak`at for the witr prayer are considered permissible?

The Prophet (ﷺ) said, “Night prayer is offered as two rak`at followed by two rak`at and so on, and if you
want to finish it, pray only one rak`a which will be witr for all the previous rak`at.” Al-Qasim said,
“Since we attained the age of puberty we have seen some people offering a three-rak`at prayer as witr
and all that is permissible. I hope there will be no harm in it.”