Prayer (Kitab Al-Salat): Detailed Injunctions about Witr
Dawud :: Book 8 : Hadith 1446
Narrated AbuSa'id ; AbuHurayrah:
The Prophet (peace_be_upon_him) said: When a man himself wakes at night and wakens his wife and they pray two rak'ahs together, they are recorded among the men and women who make much mention of Allah.