Sleeping in a state of Janabah?
If a person enters a state of Janabah (major ritual impurity), it is better for them to attain purity by performing Ghusl (ritual bath); however, if due to some excuse they intend to sleep in that same state, they should wash their private parts and perform Wudu (ablution) just like the Wudu for Salah, and then go to sleep. (Kitab an-Nawazil/Vol: 15/Pg: 287)