(6) باب جَوَازِ نَوْمِ الْجُنُبِ وَاسْتِحْبَابِ الْوُضُوءِ لَهُ وَغَسْلِ الْفَرْجِ إِذَا أَرَادَ أَنْ يَأْكُلَ أَوْ يَشْرَبَ أَوْ يَنَامَ أَوْ يُجَامِعَل
Ibn 'Umar reported:
Umar said: Is one amongst us permitted to sleep in a state of impurity (i. e. after having sexual intercourse)? He (the Holy Prophet) said: Yes, after performing ablution. (ID)
Reference (ID): Sahih Muslim 306 a (ID)
In-book reference (ID): Book 3, Hadith 24 (ID)
USC-MSA web (English) reference(deprecated numbering scheme): Book 3, Hadith 600 (ID)