Musannaf Ibn Abi Shayba 1:1439

Waki’ narrated to us, from Shu’bah, from ‘Amr ibn Murrah, from Yusuf ibn Mahak, from ‘Ubayd ibn ‘Umayr, regarding a man who has a wound: He said: He should perform ghusl (full body wash) and wash what is around it.