Sunan Abi Dawud

Narrated Hakam ibn Sufyan ath-Thaqafi: When the Messenger of Allah (ﷺ) urinated, he performed ablution and sprinkled water on private parts of the body. Abu Dawud said: A group of scholars agreed with Sufyan upon this chain of narrators. Some have mentioned the name of Sufyan b. al-Hakam, and others al-Hakam b. Sufyan