The Prophet ﷺ said: May Allah show mercy to a man who gets up during the night and prays, who wakens his wife and she prays; if she refuses, he sprinkles water on her face. May Allah show mercy to a woman who gets up during the night and prays, who wakens her husband and he prays; if he refuses she sprinkles water on his face.  

قَالَ رَسُولُ اللَّهِ رَحِمَ اللَّهُ رَجُلاً قَامَ مِنَ اللَّيْلِ فَصَلَّى وَأَيْقَظَ امْرَأَتَهُ فَصَلَّتْ فَإِنْ أَبَتْ نَضَحَ فِي وَجْهِهَا الْمَاءَ رَحِمَ اللَّهُ امْرَأَةً قَامَتْ مِنَ اللَّيْلِ فَصَلَّتْ وَأَيْقَظَتْ زَوْجَهَا فَإِنْ أَبَى نَضَحَتْ فِي وَجْهِهِ الْمَاءَ  

The Prophet ﷺ 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.  

عَنْ أَبِي سَعِيدٍ الْخُدْرِيِّ وَأَبِي هُرَيْرَةَ قَالاَ قَالَ رَسُولُ اللَّهِ ﷺ مَنِ اسْتَيْقَظَ مِنَ اللَّيْلِ وَأَيْقَظَ امْرَأَتَهُ فَصَلَّيَا رَكْعَتَيْنِ جَمِيعًا كُتِبَا مِنَ الذَّاكِرِينَ اللَّهَ كَثِيرًا وَالذَّاكِرَاتِ