أَخْبَرَنَا يَعْقُوبُ بْنُ إِبْرَاهِيمَ، قَالَ حَدَّثَنَا يَحْيَى، عَنِ ابْنِ عَجْلاَنَ، قَالَ حَدَّثَنِي الْقَعْقَاعُ، عَنْ أَبِي صَالِحٍ، عَنْ أَبِي هُرَيْرَةَ، قَالَ قَالَ رَسُولُ اللَّهِ صلى الله عليه وسلم ‏"‏ رَحِمَ اللَّهُ رَجُلاً قَامَ مِنَ اللَّيْلِ فَصَلَّى ثُمَّ أَيْقَظَ امْرَأَتَهُ فَصَلَّتْ فَإِنْ أَبَتْ نَضَحَ فِي وَجْهِهَا الْمَاءَ وَرَحِمَ اللَّهُ امْرَأَةً قَامَتْ مِنَ اللَّيْلِ فَصَلَّتْ ثُمَّ أَيْقَظَتْ زَوْجَهَا فَصَلَّى فَإِنْ أَبَى نَضَحَتْ فِي وَجْهِهِ الْمَاءَ ‏"‏ ‏.‏

It was narrated that Abu Hurairah said: "The Messenger of Allah (PBUH) said: 'May Allah (SWT) have mercy on a man who gets up at night and prays, then he wakes his wife and she prays, and if she refuses he sprinkles water in her face. And may Allah (SWT) have mercy on a woman who gets up at night and prays, then she wakes her husband and prays, and if he refuses she sprinkles water in his face.'" Translation Not Available

Book Ref: Sunan An Nisai Book 20 Hadith 1610
Web Ref:  Sunan An Nisai Vol 2 Book 20 Hadith 1611