When any one amongst you squats for answering the call of nature, he should neither turn his face towards the Qibla nor turn his back towards it.
Sahih Muslim Book 2, Hadith 77
← Previous Hadith The Apostle of Allah (ﷺ) said: Whenever you go to the desert, neither turn your face nor turn your back towards the Qibla while answering the call of nature, but face towards the east or the west. Abu Ayyub said: When we came to Syria we found that the latrines already built there were facing towards the Qibla. We turned our faces away from them and begged forgiveness of the Lord. He said: Yes.

Sahih Muslim Book 2, Hadith 76 Next Hadith → I was offering my prayer in the mosque and Abdullah b. Umar was sitting there reclining with his back towards the Qibla. After completing my prayer. I went to him from one side. Abdullah said: People say when you go to the latrine, you should neither turn your face towards the Qibla nor towards Bait-ul-Maqdis. 'Abdullah said (farther): I went up to the roof of the house and saw the Messenger of Allah (ﷺ) squatting on two bricks for relieving himself with his face towards Bait-al-Maqdis.

Sahih Muslim Book 2, Hadith 78