Abu Hurairah reports that the Prophet (peace be upon him) said:
"May Allah bless the man who gets up during the night to pray and wakes up his wife and who, if she refuses to get up, sprinkles some water on her face.
And may Allah bless the woman who gets up during the night to pray and wakes up her husband and who, if he refuses sprinkles some water on his face."
The Prophet (peace be upon him) also said: "If a man wakes his wife and prays during the night or they pray two rak`at together, they will be recorded among those (men and women) who (constantly) make remembrance of Allah."Related by Abu Dawud.