Musannaf Ibn Abi Shayba 1:1781

Abu Bakr narrated to us, he said: Muhammad ibn Bishr narrated to us, he said: Zakariya ibn Abi Za’idah narrated to us, he said: Mansur said: Mujahid narrated to me, from al-Hakam ibn Sufyan al-Thaqafi, that he saw the Prophet, may Allah bless him and grant him peace, perform ablution. Then he took a handful of water and sprinkled it over his private part.