The Prophet ﷺ said: May Allah have mercy on a man who gets up at night and prays, and awakens his wife; if she refuses, he should sprinkle water on her face. May Allah have mercy on a woman who gets up at night and prays, and awakens her husband; if he refuses, she would sprinkle water on his face. (Using translation from Abū Dāʾūd 1308)  

قَالَ رَسُولُ اللهِ ﷺ «رَحِمَ اللهُ رَجُلًا قَامَ مِنَ اللَّيْلِ فَصَلَّى ثُمَّ أَيْقَظَ امْرَأَتَهُ فَصَلَّتْ فَإِنْ أَبَتْ نَضَحَ فِي وَجْهِهَا الْمَاءَ وَرَحِمَ اللهُ امْرَأَةً قَامَتْ مِنَ اللَّيْلِ فَصَلَّتْ ثُمَّ أَيْقَظَتْ زَوْجَهَا فَصَلَّى فَإِنْ أَبَى نَضَحْتَ فِي وَجْهِهِ الْمَاءَ»  

The Messenger of Allah ﷺ said: 'When any one of you goes to sleep, the Shaitan ties three knots on his head, saying each time: "(Sleep) a long night." If he wakes up and remembers Allah (SWT), one knot is undone. If he performs wudu', another knot is undone. If he prays, all the knots are undone and he starts his day in a good mood and feeling energetic. Otherwise he starts his day in a bad mood and feeling lethargic.'" (Using translation from Nasāʾī 1607)  

قَالَ رَسُولُ اللهِ ﷺ «إِذَا نَامَ أَحَدُكُمْ عَقَدَ الشَّيْطَانُ عَلَى رَأْسِهِ ثَلَاثَ عِقْدٍ يَضْرِبُ عَلَى كُلِّ عُقْدَةٍ لَيْلًا طَوِيلًا أَيِ ارْقُدْ فَإِذَا اسْتَيْقَظَ فَذَكَرَ اللهَ انْحَلَّتْ عُقْدَةً فَإِنْ تَوَضَّأَ انْحَلَّتْ أُخْرَى فَإِنْ صَلَّى انْحَلَّتِ الْعِقْدُ كُلُّهَا فَيُصْبِحُ طِيِّبَ النَّفْسِ نَشِيطًا وَإِلَّا أَصْبَحَ خَبِيثَ النَّفْسِ كَسْلَانًا»