Sahih Bukhari 289

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. ..

Narrated Hisham: as the following Hadith 290. Narrated Abu Huraira: The Prophet said, When a man sits in between the four parts of a woman and did the sexual intercourse with her, bath becomes compulsory. ..

Narrated Zaid bin Khalid Al-Juhani: I asked `Uthman bin `Affan about a man who engaged in the sexual intercourse with his wife but did not discharge. `Uthman replied, He should perform ablution like that for the prayer after washing his private..

Narrated Ubai bin Ka`b: I asked Allah's Apostle about a man who engages in sexual intercourse with his wife but does not discharge. He replied, He should wash the parts which comes in contact with the private parts of the woman, perform ablution..