It was narrated that 'Aishah said:
"Mention was made in the presence of the Messenger of Allah of some people who did not like to face towards the Qiblah with their private parts. He said: 'I think that they do that. Turn my seat (in the toilet) to face the Qiblah.'" (Da'if)Another chain with similar wording. (DE)
English reference (DE): Vol. 1, Book 1, Hadith 324 (DE)
Arabic reference (DE): Book 1, Hadith 346 (DE)