The Book of Menstruation
3/6. Chapter:
It is permissible for one who is junub to sleep, but it is recommended for him to perform wudu’, and wash his private parts if he wants to eat, drink, sleep, or have intercourse
Sahih Muslim
وَحَدَّثَنِيهِ زُهَيْرُ بْنُ حَرْبٍ، حَدَّثَنَا عَبْدُ الرَّحْمَنِ بْنُ مَهْدِيٍّ، ح وَحَدَّثَنِيهِ هَارُونُ بْنُ سَعِيدٍ الأَيْلِيُّ، حَدَّثَنَا ابْنُ وَهْبٍ، جَمِيعًا عَنْ مُعَاوِيَةَ بْنِ صَالِحٍ، بِهَذَا الإِسْنَادِ مِثْلَهُ .
This hadith has been transmitted with the same chain of transmitters from Mu'awyia b. Salih by Zuhair b. Harb, 'Abd al-Rahman b. Mahdi, Harun b. Sa'id al-'Aili and Ibn Wahb.
Reference : Sahih Muslim 307bIn-book reference : Book 3, Hadith 28USC-MSA web (English) reference : Book 3, Hadith 604