Musnad Ahmad 30:419

'Abd al-A'la narrated to us, Yunus narrated to us, from al-Hasan, from Abu Hurayrah, who said: They mentioned a man in the presence of the Prophet, peace and blessings of Allah be upon him, or a man said: "O Messenger of Allah, such-and-such a person slept last night and did not pray until he reached the morning." He said: "Satan urinated in his ear."