The Book of Ghusl and Tayammum
4/29. Chapter:
The Command To Perform Wudu' After Sleeping
Sunan an-Nasai
أَخْبَرَنَا يَعْقُوبُ بْنُ إِبْرَاهِيمَ، قَالَ حَدَّثَنَا مُحَمَّدُ بْنُ عَبْدِ الرَّحْمَنِ الطُّفَاوِيُّ، قَالَ حَدَّثَنَا أَيُّوبُ، عَنْ أَبِي قِلاَبَةَ، عَنْ أَنَسٍ، أَنَّ رَسُولَ اللَّهِ صلى الله عليه وسلم قَالَ " إِذَا نَعَسَ أَحَدُكُمْ فِي صَلاَتِهِ فَلْيَنْصَرِفْ وَلْيَرْقُدْ " .
It was narrated from Anas that the Messenger of Allah (ﷺ) said: "If anyone of you feels drowsy during his Salah, let him go and take a nap."
Reference : Sunan an-Nasa'i 443In-book reference : Book 4, Hadith 49English translation : Vol. 1, Book 4, Hadith 444