Hadith 288
Narrated `Aisha: Whenever the Prophet intended to sleep while he was Junub, he used to wash his private parts and perform ablution like that for the prayer.
Hadith 289
Narrated `Abdullah: `Umar asked the Prophet "Can anyone of us sleep while he is Junub?" He replied, "Yes, if he performs ablution."
Hadith 290
Narrated `Abdullah bin `Umar: `Umar bin Al-Khattab told Allah's Apostle, "I became Junub at night." Allah's Apostle replied, "Perform ablution after washing your private parts and then sleep."