Mention was made before the Prophet (may Allah's peace and blessings be upon him) of a man who slept throughout the night until morning. So he said: That is a man in whose ears (or he said: in whose ear) the devil urinated. [Al-Bukhari]

"عن ابن مسعود -رضي الله عنه- قال: ذُكِرَ عند النبي -صلى الله عليه وسلم- رجل نام ليلة حتى أصبح، قال: «ذاك رجل بال الشيطان في أُذُنَيْهِ - أو قال: في أُذُنِه». [صحيح.] - [متفق عليه.]"