Reference: http://www.alfawzan.af.org.sa/node/16085
Question: Before [praying] the Witr [prayer], he prays two rak’ahs and recites what he is able to of the Qur.aan; [so] is this considered [to be] the night prayer?
Response: Yes, it is considered [to be] the night prayer if he prayed before the Witr [prayer]; even if [he prayed] two rak’ahs then followed it with the Witr [prayer] – then in this case it is considered [to be] from the night prayer as long as this is [done] before [the time of] Fajr has entered.
Translation originally published on 27 December, 2015
