5 chains merged

The Messenger of Allah said: "Rinse your mouths after drinking milk, for it has some greasiness in it."

"The Messenger of Allah would become sexually impure and then sleep without water until he got up later on and taken a bath."

The Messenger of Allah would become sexually impure then sleep as he was, without touching water. (Da'if)Sufyan said: "I mentioned this Hadith one day, and Isma'il said to me: 'O young man, you should support this Hadith with something else

"When the Messenger of Allah wanted to sleep and he was sexually impure, he would perform ablution as for prayer."

He used to become sexually impure at night, then he would want to sleep. The Messenger of Allah told him to perform ablution and then go to sleep.